Milk contains proteins, fats, carbohydrates, minerals and water. The proportion of the various constituents is highly variable between different species of mammals. 6.23 Milk doesn't just leak out whenever, it generally requires a chemical and physical stimulus. The chemical stimulus to release milk is the hormone oxytocin produced in the pituitary gland. The physical release is normally the act of suckling.
Milk also contains antibacterial and antifungal agents.
The amount of protein in a mother's milk controls how fast her young grow. While a young horse takes 60 days to double its weight after birth a baby Harp seal doubles its weight in only 5 days after birth. These pages are here free for you to use, I would like to keep them that way, however making and running this site, and the other sites I am currently making or have made, on Birds, Mammals, Insects and Fish and Bacteria costs money. There are simple ways you can help. By using the search engines here you make me 2 or 3 cents a time, by buying goods from Discovery Store you also help.