Question

Describe three unique features of the mammalian skeletal system.

a) Scales, hollow bones, and long tail.
b) Mammary glands, four-chambered heart, and viviparity.
c) Mammary glands, hair, and a diaphragm for breathing.
d) Feathers, viviparity, and a three-chambered heart.

Answer 1

Mammalian skeletal system features include heterodont teeth, a diaphragm for efficient breathing, and a four-chambered heart for effective blood circulation.

Step-by-step explanation:

The skeletal system of mammals features several distinct characteristics that differentiate them from other vertebrates. One of the unique features of the mammalian skeletal system is the presence of heterodont teeth, which refers to having different types and shapes of teeth specialized for various functions such as cutting, grinding, and tearing food. Another feature is the presence of a diaphragm, a muscle that plays a critical role in respiration by allowing mammals to breathe more efficiently. Mammals also possess a four-chambered heart, which further aids in efficient circulation of oxygenated blood separate from deoxygenated blood, a feature that supports their endothermic metabolism and active lifestyles.