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Protecting the Body: Understanding Skin Layers and Blood Functions

Explore the intricate processes of the skin layers and the crucial functions of blood cells in protecting us from invaders and delivering nutrients. Learn how our body defends against infections and regulates temperature.

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Protecting the Body: Understanding Skin Layers and Blood Functions

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  1. Keeping Hazardous Substances out of the Body

  2. Set 57—No.2: Skin—300 X

  3. Set 57—No.2: Skin More info: The cells at the bottom are alive and dividing. Cells at the surface are dead and eventually flake off.

  4. Set 57—No.1: Epidermis—16 X

  5. Set 57—No.1: Epidermis More info: A = outer layer of dead skin cells B = growth layer of skin C = connective tissue D = sense organ E = fat cells

  6. Set 57—No.4: Sweat Gland—80 X Finger tip sweat

  7. Set 57—No.4: Sweat Gland More info: This slide shows skin from the palm. Sweat glands also release excess heat, preventing overheating.

  8. Set 95—No.1: Human Blood—900 X

  9. Set 95—No.1: Human Blood More info: Red blood cells carry oxygen to cells. White blood cells are involved with protecting us from invaders. Pt = platelets (make blood clot) PL = plasma (fluid)

  10. Set 95—No.4: Cell Eating—25,000 X

  11. Set 95—No.4: Cell Eating—25,000 X rotated, enlarged

  12. Set 95—No.4: More info: The white blood cell is the larger cell. The dark smaller cells are the bacteria.

  13. Set 95—No.4: Cell Eating—25,000 Xrotated, enlarged

  14. Set 95—No.4: More info: This 3d image shows the white blood cell and its pseudopods beginning to engulf the rod shaped bacterium.

  15. Set 95—No.4: Cell Eating

  16. Set 95—No.4: Cell Eating

  17. Set 95—No.8: Infected Blood—800 X

  18. Set 95—No.8: Infected Blood More info: Tsetse flies carry trypanosomiasis (sleeping sickness). Blood is poisoned, lymph nodes and the brain’s covering swell. The large brownish spot with the dark markings is a white blood cell.

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