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Blood

Important functions

Transportation

Defense against pathogens

- White blood cells

- Oxygen from the longs to cells

- Carbon dioxide from the cells to the lungs

- Nutrients from the small intestine to cells

- Hormones from hormone glands

Repair with blood clots

Blood type

Assignment

Which blood group do you have?

- Wash your hands

- Warm up a finger

- Make a little hole with the needle

- Put two drops of blood on the plate

- Add a drop of anti bodies A to one drop of blood

- Add a drop of anti bodies B to the other drop of blood

- Look at the results

- Make a conclusion

Blood composition

Blood plasma

Separating components

Red blood cells

- Transportation of oxygen and carbon dioxide

- Contains hemoglobin:

O2 and CO2 binds with hemoglobin

White blood cells

Platelets

- Torn off pieces of cells (karyocytes)

- Will attach to red blood cells and fibrin for blood clott

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