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Characteristics of Class Mammalia
- Have mammary glands, hence the name Mammalia.
- The body is covered with fur or hair.
- Have heterodont dentition; teeth divided into four types.
- Have two pinnae (external ear).
- Have sweat glands
- Have a diaphragm that separates the body cavity into the thoracic and abdominal cavity.
- Have 7 cervical bones at their neck.
- Have lungs for gaseous exchange.
- Have a double circulatory system; with a four-chambered heart.
- Have four limbs.
- Their brain is highly developed.
- Are endothermic.
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