Pigs are one of the most recognizable farm animals on the planet, and they have been living alongside humans for roughly 9,000 years. From small backyard homesteads to massive commercial operations, these animals play a huge role in agriculture, food production, and even medical research.
But here’s something most people don’t think about: the average pig is made up of dozens of distinct external parts, each with its own name and purpose. Whether you’re a farmer, a veterinary student, a butcher, or simply curious about the animal behind your morning bacon, understanding these parts gives you a much deeper appreciation for pig anatomy.
Knowing your way around a pig’s body isn’t reserved for experts. It’s practical knowledge that helps with everything from livestock evaluation to meat selection to animal health. And once you see how all these parts fit together, you’ll never look at a pig the same way again.
Pig Parts Diagram & Details
The diagram presents a side-profile view of a mature pig, with labeled arrows pointing to 27 distinct external body parts. Starting from the front of the animal, you can trace the snout, head, jowl, ear, and neck before moving across the shoulder, forerib area, back, loin, and rump. The underside of the pig features the fore flank, belly, side, teats, and rear flank. The limbs are broken down into finer detail as well, with labels for the elbow, knee, cannon bone, pastern, and foot on the front legs, and the stifle joint, hock, and dewclaw on the hind legs. Reproductive parts like the vulva (on a gilt, or young female) and the sheath (on a barrow, or castrated male) are also identified, along with the tail at the very rear.
Each of these parts serves a specific biological function, and many of them also correspond to primal cuts or evaluation points used by farmers, judges, and butchers. Let’s walk through every single one.
1. Snout
The snout is the pig’s most iconic feature, and it sits right at the front of the face. It’s a flat, disc-shaped structure made of tough cartilage, packed with nerve endings and moisture. Pigs use their snouts the way you might use your hands — to explore, dig, push, and feel their surroundings.
What makes the snout truly remarkable is its sensitivity. A pig’s sense of smell is estimated to be up to 2,000 times more powerful than a human’s, and the snout is the hub of all that olfactory power. That’s why pigs have historically been used to hunt truffles buried deep underground. Beyond foraging, the snout also plays a role in social behavior, as pigs nudge each other with their snouts to communicate.
2. Head
Right behind the snout, the head houses the brain, eyes, and much of the pig’s sensory equipment. It’s broad and somewhat flat in most commercial breeds, though shape can vary significantly depending on the breed. Heritage breeds like the Berkshire, for example, tend to have a shorter, more dished face compared to the longer head of a Landrace.
From a meat perspective, the head is often overlooked in modern Western cuisine, but it’s actually quite valuable. Head meat is used to make traditional dishes like head cheese (a type of cold cut), and in many cultures, the entire head is roasted or braised as a delicacy.
3. Jowl
Sitting just below the head and behind the jaw, the jowl is a fatty, flavorful cut of meat that runs along the pig’s cheek and lower jaw area. If you’ve ever eaten guanciale — the cured pork cheek used in authentic Italian carbonara — you’ve tasted jowl meat.
Because of its high fat-to-meat ratio, the jowl is prized for its rich flavor and silky texture when cooked low and slow. In the American South, cured pork jowl is a staple ingredient, often sliced and fried much like bacon. It’s one of those parts that people who know good food absolutely swear by.
4. Ear
Pig ears are thin, flat, and triangular, positioned on either side of the head. They’re made almost entirely of cartilage covered by skin, with very little fat or muscle. Ears serve the obvious purpose of hearing, and pigs actually have quite good auditory senses — they can detect sounds that humans can’t.
On the practical side, pig ears are widely used as dog chews and treats, prized for their tough, chewy texture. In many Asian and Latin American cuisines, pig ears are a popular dish, typically braised, grilled, or deep-fried until crispy. They offer a unique combination of crunch and chewiness that’s hard to replicate with any other cut.
Beyond food, pig ears are also where identification tags or notches are placed on farms, making them an important tool for livestock management and record-keeping.
5. Neck
The neck connects the head to the shoulder and is a thick, muscular region. Pigs carry a lot of weight in this area because they constantly use their heads and snouts to root and push things around. All that activity builds dense, well-marbled muscle tissue.
From a culinary standpoint, neck meat is incredibly flavorful. It benefits from slow cooking methods like braising or smoking, which break down the connective tissue and release all that intramuscular fat. Some butchers include the neck as part of the shoulder or “Boston butt” cut, while others separate it out for specialty preparations.
6. Shoulder
The shoulder is one of the largest and most economically important sections of the pig. Located at the top of the front leg, it’s a hard-working muscle group that gets plenty of exercise as the pig walks and roots. This exercise translates into rich, deeply flavored meat with generous marbling.
Pork shoulder is the source of two popular sub-cuts: the Boston butt (upper shoulder) and the picnic shoulder (lower portion). These cuts are the go-to choice for pulled pork, carnitas, and slow-roasted dishes because the connective tissue melts beautifully during long cooking times. When you’re evaluating a pig for show or market, the shoulder’s width, muscling, and proportion to the rest of the body are key indicators of overall quality.
7. Fore Flank
The fore flank is the soft, fleshy area located on the underside of the pig, just behind the front legs and below the shoulder. It’s a thinner section compared to the belly, and it tends to have less fat coverage.
In butchery, the fore flank doesn’t typically get its own standalone cut. Instead, it’s often trimmed and included with adjacent sections. For livestock evaluation, though, the fore flank matters because it helps judges assess the pig’s overall body capacity and depth of chest. A deep, smooth fore flank suggests a well-developed animal with good internal organ capacity.
8. Elbow
The elbow is the joint on the front leg, located roughly at the midpoint between the shoulder and the lower limb. It functions much like your own elbow, allowing the front leg to flex and extend as the pig moves.
Healthy elbow joints are essential for a pig’s mobility and overall well-being. Swelling, stiffness, or abnormal angles at the elbow can signal joint disease, injury, or conformational problems. Farmers and veterinarians pay close attention to leg joints during health checks because soundness in the legs directly affects the animal’s ability to eat, drink, and thrive.
9. Knee
Just below the elbow, the knee (technically called the carpus in veterinary anatomy) is the forward-facing joint on the pig’s front leg. It corresponds to the human wrist, even though we tend to call it a knee because of where it sits.
Proper knee structure is critical for structural soundness. A pig with weak or overly straight knees may have trouble supporting its weight, especially as it grows. During livestock judging, evaluators look for knees that are flat, tight, and correctly angled, with no signs of buckling or swelling.
10. Cannon Bone
The cannon bone is the long, straight bone that runs between the knee and the pastern on the front leg. Think of it as the shin of the pig’s lower limb. It’s a weight-bearing bone, and its length and thickness vary somewhat between breeds.
In terms of evaluation, a clean, properly aligned cannon bone indicates good skeletal structure. If the cannon bone appears too long or too fine, the pig may be prone to leg weakness. On the flip side, a short, thick cannon bone often suggests a stout, well-supported frame.
11. Pastern
The pastern is the short, slightly angled section between the cannon bone and the foot. It acts as a shock absorber, cushioning the impact every time the pig takes a step.
A good pastern has a slight slope to it — not too steep and not too upright. If the pastern is too straight, the pig’s stride becomes jarring, which can lead to joint problems over time. If it’s too angled, the pig may develop weakness in the lower leg. Getting this angle right is one of the finer points of structural evaluation, and experienced breeders keep a close eye on pastern quality when selecting breeding stock.
12. Foot (Toes)
At the very bottom of each leg, the pig’s foot is made up of two main toes (or hooves) that bear the animal’s weight, plus two smaller dewclaws that sit higher up. Pigs are classified as even-toed ungulates, meaning they walk on an even number of toes — specifically, their third and fourth digits.
Foot health is a huge deal in pig farming. Overgrown hooves, cracks, and infections can cause lameness, which affects everything from feeding behavior to reproductive performance. Regular hoof trimming and clean, dry living conditions go a long way in keeping feet in good shape.
Proper foot structure is also a key trait in breeding programs. Pigs with well-formed, evenly spaced toes and adequate heel depth tend to stay sound and productive for longer.
13. Forerib Area
Moving to the upper midsection, the forerib area sits behind the shoulder and above the belly, covering the front portion of the rib cage. This is where the ribs are most exposed and prominent beneath the skin.
The forerib area is important both anatomically and commercially. It protects the heart and lungs while also contributing to some highly valued cuts, including rib chops and certain roast preparations. A well-sprung rib cage — meaning one that curves out broadly — is a sign of good body capacity and lung room in the pig.
14. Back
The back runs along the top of the pig from behind the shoulder to the beginning of the rump. It’s one of the most closely evaluated areas in the meat industry because the muscles along the back determine the size and quality of some of the most premium pork cuts.
A wide, flat, and muscular back is what every producer hopes to see. The longissimus dorsi muscle — the main muscle along the back — is the source of pork loin chops and loin roasts, which are among the leanest and most expensive cuts available. Judges at livestock shows often place their hands along a pig’s back to feel for muscle depth and loin eye area, two traits that directly influence carcass value.
15. Loin
Directly behind the back (and sometimes described as part of it), the loin is a prized section that sits along the pig’s spine. This is where you get tenderloin, baby back ribs, and center-cut loin chops — essentially, the most tender and desirable cuts of pork.
Because the loin muscles don’t do as much heavy work as the shoulder or ham, the meat here is leaner and more tender. A long, well-muscled loin is a top priority for commercial pork producers, since loin cuts command premium prices at retail. For the home cook, loin cuts are versatile and forgiving, perfect for grilling, roasting, or pan-searing.
16. Rump
The rump is the rounded area at the top of the pig’s hindquarters, sitting between the loin and the tail. It bridges the back and the ham, and its shape gives you a good idea of the pig’s overall muscling in the hindquarter.
A long, level rump is considered ideal because it means there’s more space for the high-value muscles of the ham to develop. A steep or short rump, on the other hand, tends to limit ham size. During judging, the rump is assessed for length, levelness, and width — all indicators of a well-built, commercially valuable animal.
17. Tail
The tail is that familiar curly appendage at the very back of the pig. It’s actually made up of small vertebrae and is fully mobile. Pigs use their tails for communication and to swat away flies and other insects.
Tail position and movement can tell you a lot about a pig’s mood and health. A curly, active tail generally signals a content, healthy animal. A limp or tucked tail might indicate stress, illness, or pain. In commercial settings, tail docking (shortening the tail) is sometimes practiced to prevent tail biting, a behavioral issue that can occur in crowded conditions, though this practice is increasingly debated on animal welfare grounds.
18. Vulva (Gilt)
The vulva is the external reproductive organ of a female pig. The diagram specifically labels it on a gilt, which is a young female pig that has not yet had a litter. It’s located just below the tail on the rear of the animal.
Veterinarians and breeders examine the vulva for signs of reproductive health, including size, swelling, and discharge patterns that can indicate estrus (heat cycles). A properly developed vulva is one of the traits breeders check when selecting gilts for the breeding herd, as reproductive performance is one of the most important economic traits in pig production.
19. Ham
The ham is the large, heavily muscled upper portion of the hind leg. It’s one of the most valuable parts of the entire pig, both in terms of meat yield and market price. Fresh ham can be roasted, and cured ham — whether it’s prosciutto, country ham, or holiday ham — is a centerpiece of cuisines around the globe.
Muscling in the ham is a primary trait that breeders and producers focus on. A thick, deep, well-rounded ham signals excellent genetics and proper nutrition. During carcass evaluation, the ham often accounts for a significant percentage of the total carcass value, so a lot of breeding and management decisions are made with the ham in mind.
20. Stifle Joint
The stifle joint is the large joint on the pig’s hind leg, equivalent to the human knee. It connects the upper thigh bone (femur) to the lower leg bones and is responsible for much of the hind leg’s power and range of motion.
Like other major joints, the stifle is a common site for lameness issues. Injuries, arthritis, and developmental disorders can all affect this joint, particularly in heavier pigs that carry significant body weight. A correctly angled stifle — with a noticeable but not excessive bend — is one of the hallmarks of a structurally sound pig.
21. Hock
The hock is the prominent, angular joint on the back of the pig’s hind leg, sitting between the stifle and the foot. It corresponds roughly to the human ankle and is one of the most heavily stressed joints in the pig’s body.
A clean, well-defined hock with a proper set angle is essential for good locomotion. Hock lesions and swelling are common welfare indicators in commercial farming, often linked to flooring type and housing conditions. Pigs with poor hock structure tend to develop movement problems as they age and gain weight, which is why breeders evaluate this joint carefully.
22. Dewclaw
The dewclaw is a small, accessory toe located higher up on the leg, behind and above the main hooves. Both front and hind legs have dewclaws, though they don’t typically make contact with the ground during normal walking.
While dewclaws may seem like a minor detail, they can occasionally cause issues. Overgrown or injured dewclaws can become infected or catch on equipment and flooring. Keeping them trimmed and monitoring for damage is a small but important part of routine pig care.
23. Rear Flank
The rear flank is the soft tissue area on the pig’s underside, located between the belly and the hind leg. It’s a relatively thin, flexible region that moves visibly as the pig breathes and walks.
From an evaluation perspective, the rear flank gives clues about the pig’s body condition and internal capacity. A smooth, deep rear flank indicates a well-fed animal with good gut fill, while a tucked-up or pinched flank may suggest the pig is underweight or stressed. Judges often glance at the rear flank as a quick visual check of overall condition.
24. Sheath (Barrow)
The sheath is the external covering of the reproductive organ on a barrow, which is a castrated male pig. It’s located on the underside of the belly, roughly in the middle of the body, and it’s labeled specifically on a barrow because intact boars and gilts have different external anatomy in this area.
Barrows are the most common market pigs because castration reduces aggressive behavior and eliminates boar taint, an unpleasant odor and flavor that can affect the meat of intact males. The sheath itself doesn’t have direct significance for meat quality, but its size and position can occasionally affect the trimming process during carcass fabrication.
25. Side
The side refers to the broad, flat area along the pig’s midsection, between the back and the belly. It encompasses a large portion of the rib cage and is one of the most visually prominent regions when viewing the pig in profile.
Commercially, the side is where spare ribs and St. Louis-style ribs come from. A pig with a long, deep side tends to yield more rib meat and a better overall balance of primal cuts. In carcass evaluation, side length is measured as an indicator of body capacity and growth potential.
26. Belly
The belly hangs along the underside of the pig, below the side and between the front and rear flanks. It’s one of the fattiest parts of the animal, and it’s the source of one of the most beloved pork products in existence: bacon.
Pork belly has experienced a massive surge in popularity over the past two decades, moving from a budget cut to a restaurant staple. Braised pork belly, crispy pork belly, and house-cured bacon have become menu mainstays at eateries of every level. The ideal belly is thick, uniform, and layered with alternating streaks of fat and lean meat, which creates that signature melt-in-your-mouth texture when cooked properly.
Beyond bacon, pork belly is also used for pancetta, salt pork, and countless traditional dishes from Chinese, Korean, and Filipino cuisines. It’s a cut that rewards patience and low-and-slow cooking techniques.
27. Teats
The teats are located along the underside of the pig’s belly, arranged in two rows running from the chest area back toward the hind legs. Both male and female pigs have teats, though they’re functionally important only in breeding females (sows and gilts) who need them to nurse their piglets.
The number of teats matters in pig production. Most pigs have between 12 and 16 teats, and a higher count is generally preferred because it means the sow can nurse more piglets per litter. Breeders look for evenly spaced, well-formed teats when selecting replacement gilts, since teat quality directly affects a sow’s ability to raise large, healthy litters. Teats that are inverted, blind (non-functional), or unevenly spaced can reduce nursing efficiency and lead to smaller, less uniform piglets.
