Examples of animals with mammary glands?

Examples of animals with mammary glands?

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8 months ago
they includes cow,goat,pigs, sheeps etc.
Mammary glands are made up of a system of ducts surrounded by glandular tissue, which secretes milk. Milk formation is stimulated by the hormones prolactin and growth hormone; secretion of these hormones is in turn stimulated by the act of suckling.
Mammary glands differ somewhat in form from species to species of mammals.
Those of monotremes are simple aggregations of glandular tissue along the abdominal wall.
Milk is secretedinto depressions and is licked off of the fur by the young. In many species (e.g., humans), numerous ducts discharge separately to the surface of a fleshy protuberance called an***le. In others (e.g., cows), the ducts secrete their milk into a common reservoir, which discharges to the outside via a single opening in ateat.Mammary glands also differ in location and number.
Some marsupials have up to 19 or 20 n***les, located in a pouch.
Eutherians with large litter sizes have n***les arrayed in lines on each side of the body; in extreme cases, such as the African rat Mastomys, they run from the axillae (armpits) along the body to the sides of the thighs.
Many mammals have a single pair, but among these the locationvaries. Manatees, for example, have a pair of axillary n***les; in humans, the n***les are pectoral; in horses, abdominal.Milk contains high percentages of protein, fat, and sugars (especially lactose), and some amount of vitamins and salts. It is a very rich food source, which varies considerably among species in composition.
A mammary gland is an exocrine gland in
humans and other mammals that produces
milk to feed young offspring. Mammals get
their name from the Latin word mamma ,
"bosom". The mammary glands are arranged
in organs such as the bosoms in primates (for
example, humans and chimpanzees), the
udder in ruminants (for example, cows, goats,
and deer), and the dugs of other animals (for
example, dogs and cats). Lactorrhea , the
occasional production of milk by the glands,
can occur in any mammal, but in most
mammals, lactation , the production of enough
milk for nursing , occurs only in phenotypic
females who have gestated in recent months
or years. It is directed by hormonal guidance
from s*x steroids. In a few mammalian
species, male lactation can occur. With
humans male lactation can occur only under
specific circumstances.
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