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The Human Body Systems

The Human Body Systems. “It is shameful for man to rest in ignorance of the structure of his own body, especially when the knowledge of it mainly conduces to his welfare, and directs his application of his own powers .” . What are the levels of organization in a m ulticellular organism?.

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The Human Body Systems

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  1. The Human Body Systems “It is shameful for man to rest in ignorance of the structure of his own body, especially when the knowledge of it mainly conduces to his welfare, and directs his application of his own powers.”

  2. What are the levels of organization in a multicellular organism? • Cells  Organ  Tissues  Organ System • Tissues  Cells  Organ  Organ System • Cells  Organ  Organ System  Tissues • Cells  Tissues  Organ  Organ System

  3. Cells  Tissues  Organs  Organ System • Tissues: groups of similar cells that perform a single function, such as connecting a muscle to a bone • Organ: group of tissues that work together to perform a complex function, such as sight • Organ System: group of organs that perform closely related functions

  4. Cardiac Muscle Tissue Muscle Cells Heart Human Circulatory System

  5. 4 Major Types of Tissues in the Body • Epithelial Tissue: includes glands & tissues that cover interior & exterior body surfaces • Connective Tissue: provides support for the body & connects its parts • Nervous Tissue: transmits nerve impulses throughout the body • Muscle Tissue: along with bones, enables the body to move & move substances through the body

  6. Your skin is a type of: • Epithelial Tissue • Connective Tissue • Nervous Tissue • Muscle Tissue Epithelial Tissue!

  7. Your tongue is a type of: • Epithelial Tissue • Connective Tissue • Nervous Tissue • Muscle Tissue Muscle Tissue!

  8. Your Achilles Tendon is a type of: • Epithelial Tissue • Connective Tissue • Nervous Tissue • Muscle Tissue Connective Tissue!

  9. The Human Body Systems • Nervous System • Skeletal System • Muscular System • Integumentary System • Digestive System • Excretory System • Respiratory System • Circulatory System • Endocrine System • Reproductive System • Immune System All of your body systems work together to keep your body functioning normally.

  10. Homeostasis • Our body systems work together to help us maintain homeostasis, a stable internal environment. • Homeostasis is maintained by feedback inhibition, where the result limits the process.

  11. Feedback Inhibition Think of a thermostat & how it cools the room.

  12. Keeping Blood Sugar Levels Constant Rise in blood glucose levels above the set point. Pancreas stops secreting insulin. Pancreas secretes insulin into the blood. Glucose is absorbed or stored by the body’s cells, removing it from the blood. Blood glucose level returns to set point.

  13. Homeostasis Activity • How does light affect pupil dilation? • How does exercise affect your pulse? • How does standing on 1 leg affect your balance?

  14. Before you leave… • Answer the following question at the bottom of your handout: Which body system do you think helps your body maintain homeostasis? Defend your answer!

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