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Body Systems

Learn how our 11 body systems work together to maintain stable internal conditions (homeostasis) and support overall health and function. Explore the functions and structures of key systems like the digestive, nervous, immune, circulatory, and more.

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Body Systems

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  1. Body Systems Overview

  2. Homeostasis • The process of maintaining stable internal conditions is called homeostasis. • our body systems need to all work together in a coordinated fashion in order to maintain homeostasis

  3. We have 11 Body Systems

  4. Digestive System Function: to break down food particles into simpler molecules so our body can absorb them Structures: mouth, pharynx, esophagus, stomach, small intestine, large intestine, gall bladder, pancreas, & liver

  5. Nervous System Function: coordinates all body activities and is the communication between the body and its environment Structures: brain, spinal cord, & nerves

  6. Immune Function: defense against pathogens & foreign agents Structures: White blood cells, antibodies, bone marrow, lymph nodes

  7. Circulatory System Function: Transports gases (oxygen and carbon dioxide), nutrients, and wastes throughout the body via blood vessels Structures: vessels (arteries, capillaries, veins), heart, & blood

  8. Integumentary System Function: to cover our body and provide it with protection. Structures: epidermis & dermis

  9. Skeletal System Function: supports our body, allows for muscle attachment, protects organs, makes blood cells, and is a storage site Structures: bones

  10. Muscular System Function: allows for voluntary and involuntary movements Structures: muscles

  11. Excretory System Function: help maintain homeostasis of body fluids Structures: kidneys, ureters, bladder, & urethra

  12. Endocrine System Function: to regulate body functions using hormones Structures: glands, & hormones

  13. Respiratory System Function: breathing, allows for gas exchange via the lungs Structures: lungs (bronchi, bronchioles, alveoli), diaphragm, trachea, mouth, nose

  14. Reproductive System Function: to produce gametes that can be used to produce offspring Structures: ovaries, uterus, testes, sperm, eggs

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