Which term describes an internal skeleton?

Which term describes an internal skeleton?

• A. Exoskeleton
• B. Endoskeleton
• C. External skeleton
• D. Hydroskeleton

Answer: (B)

The term describing an internal skeleton is endoskeleton. An endoskeleton sits inside the body and is typically made of bone and cartilage in animals like humans, providing a sturdy internal framework that supports the body, protects internal organs (for example, the skull protects the brain and the rib cage guards the heart and lungs), and serves as a fixed point for muscle attachment. It also allows growth and remodeling over time. In contrast, an exoskeleton lies on the outside of the body, as seen in insects and crustaceans; a hydrostatic skeleton relies on fluid pressure within a body cavity for support. So, endoskeleton best matches the idea of an internal skeleton.

The term describing an internal skeleton is endoskeleton. An endoskeleton sits inside the body and is typically made of bone and cartilage in animals like humans, providing a sturdy internal framework that supports the body, protects internal organs (for example, the skull protects the brain and the rib cage guards the heart and lungs), and serves as a fixed point for muscle attachment. It also allows growth and remodeling over time. In contrast, an exoskeleton lies on the outside of the body, as seen in insects and crustaceans; a hydrostatic skeleton relies on fluid pressure within a body cavity for support. So, endoskeleton best matches the idea of an internal skeleton.