Mammals are a group of animals characterized by (in females) the presence of mammary glands. Mammals are a group of animals; mammary glands are a body part.
Mammary gland
Formation of milk in the mammary gland of a mammal.
mammary gland
The Platypus releases milk from ducks in its abdomen.
"Mammal" comes from mammary gland. All animals that produce milk are mammals.
Mammary gland
Mammary gland
1. mammary gland 2. warmblooded (Biology teacher's answer: dorsal nerve cord) 3. Hairs
Mammary gland consist of glandular tissue and fatty tissue in them. Mammary glands are characteristic of mammals.
Mammary glands are the source of milk production in female (and some male) mammals
mammary alveolus
Mammals have mammary glands like whales