1. Topic: Circulatory system Aim: Describe the parts of the blood. Do Now: Explain why you have blood in your body. HW: Read pgs. 540- top of 545. Write down 10 bullets (in complete sentences).

3. Blood Liquid tissue

4. Adult = about 5L

7. PLASMA

9. Liquid part Mostly made of water (90%)

10. Transports materials: –Salt, sugar, proteins –Wastes –Enzymes –Blood cells –Hormones

11. Red Blood Cells

12. Most numerous Disc shaped Smaller than wbc’s

13. Made in bone marrow

14. RBC’s are made at a rate of 2-3 million per second in the center of long bones like the femur in your thigh. They are round and tiny. About 3,000 end to end would equal 1 inch. An average body contains about 25 trillion RBC’s. That’s 600-700 times as many as white blood cells.

15. No nucleus when mature

16. Contain HEMOGLOBIN  carries OXYGEN (& some CO 2 )

17. White Blood Cells

18. Fight infection / disease

19. Made in bone marrow Largest Fewer than RBC’s

20. An average adult’s body normally contains over 35 billion WBC’s. That’s 1 for every 600-700 RBC’s.

21. Platelets

22. Cell fragments (cytoplasm surrounded by a membrane)

24. Made in bone marrow Involved in BLOOD CLOTTING

25. Blood Clotting

26. A. Stick to edge of cut Circulatory System: Blood Platelets

27. B. Produce FIBRIN (long, sticky string) that sticks to cut vessel

29. C. Web like complex of strands forms to stop bleeding  CLOT

30. D. Clot becomes hard & dry (SCAB) E. Skin cells repaired under scab and scab falls off

31. One grain of rice = 1 cubic mm 5 million RBC’s 5,000 – 10,000 WBC’s 400,000 platelets

32. Did you know… In the US, a blood transfusion is needed about every 2 seconds. Plasma transfusions help patients with liver disease, severe burns, hemophilia, and leukemia. About half of Americans can safely be blood donors, but only 5% of these people actually donate blood.

33. Review: Identify the part of blood being described. 1.Most numerous blood cell. 2.Carries enzymes. 3.Involved in blood clotting. 4.Carries oxygen. 5.Largest blood cell. 6.Made up of 90% water. 7.Involved in blood clotting. 8.Protect the body against disease. 9.Carries hormones.