Mammals are characterized by a:

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Quizplus · Accepted Answer

Mammals have all of these characteristics: a diaphragm, a hard palate, and a four-chambered heart. The diaphragm separates the thoracic and abdominal cavities and plays a major role in respiration. The hard palate separates the oral and nasal cavities and allows for efficient breathing and chewing at the same time. The four-chambered heart has separate chambers for oxygenated and deoxygenated blood, allowing for efficient oxygenation of tissues.

Mammals Are Characterized by A