Which has an endoskeletal structure?

Which has an endoskeletal structure?

• A. Tick
• B. Mite
• C. Human
• D. Scorpion

Answer: (C)

An endoskeleton is an internal framework of bone and cartilage that supports the body, protects organs, and provides surfaces for muscle attachment so movement can occur. Humans have this internal skeleton, which grows with us and doesn’t require shed­ding to enlarge. In contrast, ticks, mites, and scorpions have an exoskeleton—an external shell made of a hard material (like chitin) that covers the body. This outer skeleton protects them and provides support, but it must be shed as they grow, so they do not have an internal endoskeleton.

An endoskeleton is an internal framework of bone and cartilage that supports the body, protects organs, and provides surfaces for muscle attachment so movement can occur. Humans have this internal skeleton, which grows with us and doesn’t require shed­ding to enlarge.

In contrast, ticks, mites, and scorpions have an exoskeleton—an external shell made of a hard material (like chitin) that covers the body. This outer skeleton protects them and provides support, but it must be shed as they grow, so they do not have an internal endoskeleton.