External anatomy for equine

[External anatomy
back: the area where the saddle goes, begins at the end of the withers, extends to the last thoracic vertebrae.
[Colloquially includes the loin or "coupling," though technically incorrect usage)
barrel: the main body area of the horse, enclosing the rib cage and the major internal organs.
cannon or cannon bone: The area between the knee or hock and the fetlock
joint, sometimes called the "shin" of the horse, though technically it
is the metacarpal III.
chestnut: a callosity on the inside of each leg
chin groove: the part of the horse's head behind the lower lip and chin.
(the area that dips down slightly on the lower jaw). Area where the
curb chain of certain bits is fastened.
coupling: see "Loin" below.
coronet or coronary band: The ring of soft tissue just above the horny hoof that blends into the skin of the leg.
crest: the upper portion of the neck where the mane grows.
croup: the topline of the horse's hindquarters, beginning at the hip,
extending proximate to the sacral vertebrae and stopping at the dock of
the tail (where the coccygeal vertebrae begin). Sometimes called "rump."

dock: the point where the tail connects to the rear of the horse.
elbow: The joint of the front leg at the point where the belly of the horse meets the leg. Homologous to the elbow in humans.
ergot: a callosity on the back of the fetlock
fetlock: Sometimes called the "ankle" of the horse, though it is not the
same skeletal structure as an ankle in humans. Known to anatomists as
the metacarpophalangeal (front) or metatarsophalangeal (hind) joint;
homologous to the "ball" of the foot or the metacarpophalangeal joints
of the fingers in humans.
flank: Where the hind legs and the barrel of the horse meet,
specifically the area right behind the rib cage and in front of the
stifle joint.
forearm: the area of the front leg between the knee and elbow. Consists
of the fused radius and ulna, and all the tissue around these bones.
Anatomically the antebrachium.
forelock: the continuation of the mane, which hangs from between the ears down onto the forehead of the horse.
frog: the highly elastic wedge-shaped mass on the underside of the hoof,
which normally makes contact with the ground every stride, supports
both the locomotion and circulation of the horse.
gaskin: the large muscle on the hind leg, just above the hock, below the stifle. Homologous to the calf of a human.
girth' or heartgirth: the area right behind the elbow of the horse,
where the girth of the saddle would go, this area should be where the
barrel is at its greatest diameter in a properly-conditioned horse that
is not pregnant or obese.
hindquarters: the large, muscular area of the hind legs, above the stifle and behind the barrel of the horse.
hock: The tarsus of the horse (hindlimb equivalent to the human ankle and heel), the large joint on the hind leg.
hoof: The foot of the horse. The hoof wall is the tough outside covering
of the hoof that comes into contact with the ground. The hoof wall is,
in many respects, a much larger and stronger version of the human
fingernail.
jugular groove: the line of indentation on the lower portion of the
neck, can be seen from either side, just above the windpipe. Beneath
this area run the jugular vein, the carotid artery and part of the
sympathetic trunk.
knee: the carpus of the horse (equivalent to the human wrist), the large joint in the front legs, above the cannon bone
loin: the area right behind the saddle, going from the last rib of the
horse to the croup. Anatomically approximate to the lumbar spine.
mane: long and relatively coarse hair growing from the dorsal ridge of
the neck, lying on either the left or right side of the neck).
muzzle: the chin, mouth, and nostrils of the horse's face.
pastern: The connection between the coronet and the fetlock. Made up of the middle and proximal phalanx.
poll: commonly refers to the poll joint at the beginning of the horse's
neck, immediately behind the ears, a slight depression at the joint
where the atlas (C1) meets the occipital crest. Anatomically, the
occipital crest itself is the "poll."
splints: bones found on each of the legs, on either side of the cannon
bone (8 total). Partially vestigial, these bones support the
corresponding carpal bones in the forelimb, and the corresponding tarsal
bones in the hindlimb.[1] Anatomically referred to as
Metacarpal/Metatarsal II (on the medial aspect (inside)) and IV (on the
lateral aspect (outside)).
shoulder: made up of the scapula and associated muscles. Runs from the
withers to the point of shoulder (the joint at the front of the chest,
i.e. the glenoid). The angle of the shoulder has a great affect on the
horse's movement and jumping ability, and is an important aspect of
equine conformation.
stifle: Corresponds to the knee of a human, consists of the articulation
between femur and tibia, as well as the articulation between patella
and femur.
tail: consists of both the living part of the tail (which consists of
the coccygeal vertebrae, muscules, and ligaments), as well as the long
hairs which grow from the living part
throatlatch: The point at which the windpipe meets the head at the underside of the jaw.
withers: the highest point of the thoracic vertebrae, the point just
above the tops of the shoulder blades. Seen best with horse standing
square and head slightly lowered. The height of the horse is measured at
the withers in "hands

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