The udder of the cow consists of 4 separate glands located in the inguinal region of the ventral or underside of the cow. Each gland has one teat and each teat has one opening. The glands are covered with hair, but the teats do not have hair.
Rear teats are usually shorter than the front teats.
The teat functions as the only exit for the secretion and the only means for the calf to recive milk. Usually, only one teat drains one gland. No hair, sweat glands or sebacious glands are found on the teats of the cow. Teat size and shape is independent of the size, shape or milk production of the udder. Generally they are removed before 1 yr of age.