The mammals are the class of vertebrate animals
characterized by the production of milk in females for the nourishment of young, from mammary
glands present on most species and specialized
skin glands in monotremes that seep or ooze milk; the presence of hair or fur; specialized teeth; three minute bones within the ear; the presence of a neocortex region in the brain; and endothermic or «warm - blooded» bodies.
Copper deficiency is
characterized by fatigue, anemia, neutropenia (low level of neutrophils, the most common type of white blood cell that protect against infection), leukopenia (abnormal decrease of leukocytes or white blood cells), bone and joint abnormalities,
skin abnormalities, impairment of nerve and muscle function, impairment of adrenal and thyroid
gland function, reproductive difficulties and loss of hair and
skin color.