Apes (Hominoidea) are a branch of Old World tailless anthropoid primates native to Africa and Southeast Asia.
The breast is one of two prominences located on the upper ventral region of the torso of primates.
Cattle—colloquially cows—are the most common type of large domesticated ungulates.
Deer (singular and plural) are the ruminant mammals forming the family Cervidae.
Female (♀) is the sex of an organism, or a part of an organism, that produces non-mobile ova (egg cells).
The domestic goat (Capra aegagrus hircus) is a subspecies of goat domesticated from the wild goat of southwest Asia and Eastern Europe.
In biology, homology is the existence of shared ancestry between a pair of structures, or genes, in different taxa.
Humans (taxonomically Homo sapiens) are the only extant members of the subtribe Hominina.
Mammals are the vertebrates within the class Mammalia (from Latin mamma "breast"), a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands.
A mammary gland is an exocrine gland in mammals that produces milk to feed young offspring.
The mammary ridge or mammary crest, is a primordium specific for the development of the mammary gland.
Bovine mastitis is the persistent, inflammatory reaction of the udder tissue due to physical trauma or microorganisms infections.
Milking is the act of removing milk from the mammary glands of cattle, water buffalo, goats, sheep and more rarely camels, horses and donkeys.
Organs are collections of tissues with similar functions.
A pig is any of the animals in the genus Sus, within the even-toed ungulate family Suidae.
Ruminants are mammals that are able to acquire nutrients from plant-based food by fermenting it in a specialized stomach prior to digestion, principally through microbial actions.
Domestic sheep (Ovis aries) are quadrupedal, ruminant mammal typically kept as livestock.