GROSS ANATOMY

Detailed explanation-1: -External defense systems include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria in your bowel. Your skin provides a physical block to stop bacteria and viruses from finding their way straight into your blood.

Detailed explanation-2: -Sorted roughly from cranial to caudal direction the main parts of large animals are the head, throat (neck), forelimbs, trunk including chest (thorax) and abdomen (stomach), tail and the hind limbs. On the head we find forehead, eyes, muzzle in a cow and snout in a pig, mouth with lips, ears, and horns in a cow.

Detailed explanation-3: -The dermis houses the sweat glands, hair, hair follicles, muscles, sensory neurons, and blood vessels.

Detailed explanation-4: -The withers is the ridge between the shoulder blades of an animal, typically a quadruped. In many species, it is the tallest point of the body.