U3 S13

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  1. What body system receives information from inside and outside of the body and responds to that information?
    The nervous system
  2. The nervous system
    collects information and responds to it by sending electrical messages. This information may come from outside or inside the body. The brain is the center of the nervous system.
  3. The integumentary system
    is the protective covering of the body. It includes the skin, hair, and nails. As a part of the immune system, the skin acts as a barrier that protects the body from infection.
  4. How is the skin part of the integumentary system and the excretory system?
    The integumentary system is the protective covering of the body. Skin is part of the excretory system because it helps remove wastes from the body.
  5. What are the basic needs of all cells in the body?
    Food, oxygen, and to have their wastes taken away.
  6. Give examples to how a cell's structure relates to its function.
    • Sperm cells have long tails that are used to move.
    • Nerve cells are long and thin to send messages long distances.
    • Surface skin cells are broad and flat.
  7. What are the main functions of the skeletal system?
    • Supports and protects the body
    • Allows the body to move
    • Stores minerals
    • Produces red blood cells
    • A human's skeleton is inside the body so it is called an endoskeleton.
  8. The Skeletal System
    • Protection
    • Bones provide protection to organs. For example, your ribs protect your heart and lungs, your vertebrae protect your spinal cord, and your skull protects your brain.
  9. The Skeletal System
    • Storage
    • The hard outer layer of bone, called compact bone, stores important minerals such as calcium. These minerals are necessary for nerves and muscles to work properly.
  10. The Skeletal System
    • Support
    • Bones provide support for your body and make it possible for you to sit or stand upright. If you did not have bones you would be a mass of soft tissue, like a slug, but you would not be able to move.
Card Set
U3 S13
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