Mammals are the class of vertebrate and primarily characterized by the presence of mammary glands. They also have hair, and the endothermic body or we always say that as the “warm-blooded”. The females produce milk as the source of their food. Their brain regulates the circulatory system, including the heart that has four divided rooms. They comprise more than 5.000 genera, 425 families scattered in and up to 46 orders, although those classifications depend on the scientific used.
Mammals have three bones of hearing in each ear and a bone (dentari) on each side of the lower jaw. Other vertebrates that have ears only have one bone of hearing (that is, stapes) in each ear and at least three other bones on each side of the jaw.
Mammals are the class of vertebrate and primarily characterized by the presence of mammary glands. They also have hair, and the endothermic body or we always say that as the “warm-blooded”. The females produce milk as the source of their food. Their brain regulates the circulatory system, including the heart that has four divided rooms. They comprise more than 5.000 genera, 425 families scattered in and up to 46 orders, although those classifications depend on the scientific used.
Mammals have three bones of hearing in each ear and a bone (dentari) on each side of the lower jaw. Other vertebrates that have ears only have one bone of hearing (that is, stapes) in each ear and at least three other bones on each side of the jaw.