Answer to Question #119292 in Evolution for Prynce Reigns

Question

Difference between the hind foot of a dog , human and a goat

Answer 1

In terms of structure and function, hind limbs of a dog have a slightly greater limb mass than their fore limbs. The hind limbs play an important role in primary propulsion as they are located relatively proximally compared to fore limbs. Distal cushion of dogs are dynamic during locomotion, alternating between phases of compression and expansion hence reducing the loads experienced by the skeletal system.

Humans have a unique plantigrade alignment which results in a distal limb structure that adapts to a variety of conditions. The limb has less tarsal bones that are shaped and aligned to adapt and transmit large loads during early stages of stance.

Lastly, the hind limbs ( pelvic limbs) of the goats consist of the pelvic girdle, thigh and lower limb made of the tarsus, metartarsals and phallanges, just like the hind limb of the the human. Goats have a radial leg spring which is lesser in the hind limbs than the fore limbs which helps in sprinting of the goat during evasion of predators.