mouth
ARMS
The knee.
legs
Mostly it is their ears.
The horse does have a frog on their hoof except it is not the real animal. It is a part of their body/hoof.
a collar bone.
Centaurs are part man, part horse. Chiron had the legs/body of a horse, but the torso, head, and arms of a man. Therefore, he was a centaur.
collar bone, toes or fingers
Yes- a neck
A horse
Lungs, muscles, tendons and bones
Adaptation, camouflage, mimicry