Mammals have skeletons that protect internal organs. Mammals have a circulatory system, a nervous system, a digestive system, a respiratory system, an endocrine system, a reproductive system, and an excretory system.
Mammals depend on their 5 senses for survival. These senses include: smell, taste, hearing, sight, and touch.
Mammals include animals that are herbivorous, carnivorous, or omnivorous.
Humans are mammals. Humans are the highest form of life on earth.