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Body and Homeostasis

Body and Homeostasis. Organization Relationship between form and function Homeostasis. Tissues. 4 types: Muscle Nervous Epithelial Connective. MUSCLE TISSUES. 3 types:

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Body and Homeostasis

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  1. Body and Homeostasis Organization Relationship between form and function Homeostasis

  2. Tissues • 4 types: • Muscle • Nervous • Epithelial • Connective

  3. MUSCLE TISSUES • 3 types: • Skeletal muscle- generally linked to bones via bundles of collagen fibers called tendons. When these are stimulated by signals from the nervous system, they generate force that leads to the contraction of the muscle. Most of these muscles are VOLUNTARY! (These muscles may also attach to skin and produce facial expressions… SMILE!)

  4. MUSCLE TISSUES • Smooth muscle: • surround hollow tubes and cavities inside the body’s organs, such that their contraction can propel the contents of those organs. Example: contraction of smooth muscle in the stomach wall propels digested food into the intestines, where it can be digested fully. • INVOLUNTARY

  5. MUSCLE TISSUES • Cardiac muscle: • Physical and electrical connections between individual cells enable many of the cells to contact almost simultaneously. • INVOLUNTARY • Found only in the heart

  6. NERVOUS TISSUES • These types of tissues initiate and conduct electrical signals from one part of the body to another. • Made up of NEURONS- single nerve cells • Neurons may connect other neurons • The nervous system provides a critical means of controlling many diverse activities of body cells.

  7. EPITHELIAL TISSUES • Sheets of densely packed cells that cover the body or individual organs or line the walls of various cavities inside the body (example: nasal passage) • Specialized to protect structures and to secrete and absorb ions and organic molecules. (Example: epithelial tissue can fold inward to form a sweat gland that secretes water and ions)

  8. CONNECTIVE TISSUES • Connect, surround, anchor, and support the structure of the body • Include: blood, adipose tissue (fat-storing), bone, cartilage, loose connective tissue, and dense connective tissue

  9. Identifying the Tissues

  10. Identifying tissues

  11. Identifying Tissues

  12. Identifying Tissues

  13. Identifying Tissues

  14. FLUIDS • Intracellular fluid- water/fluid contained inside the cells of the body • Extracellular fluid- the rest of the water that is found outside the cells • Composed of the fluid part of blood (plasma) and fluid-filled spaces that surround cells (interstitial fluid) *** The total water volume in the three compartments (ICF, plasma, and ISF) accounts for TWO-THIRDS of body weight!!!! Of the total body water, up to TWO-THIRDS is intracellular and ONE-THIRD is extracellular. - The two components of ECF (ISF and plasma) are separated by the walls of the blood vessels… ex: arteries, capillaries, and veins

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