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Structure & Function Q: What systems form the structure of the human body?

Think about it - An animal's skeleton is so durable that its bones are often recognizable years after an animal's death. Bones are so tough and strong, in fact, that it's easy to think of them as though they were nothing more than rigid, lifeless supports for the rest of the body. Nothing could be further from the truth.

Key Questions Include:

What are the functions of the skeletal system?
What is the structure of a typical Human Bone?
What is the role of joints?
What are the principal types of muscle?
How do muscles Contract?
How do muscle contractions produce movement?
What are the principal functions of skin?
What are the structures found in skin?
What are some problems that affect skin?

Active Art: How do joints function?
SciLinks: Bones and Joints
SciLinks: How Muscles Work

The Demise of a Disease

In the early twentieth century, many poorly nourished children living in the cities of the United States and Europe had very soft, weak bones, a condition called "ricketts."

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