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Circulatory System

Circulatory System. Biology 138. Circulatory System Overview. Parts Blood Vessels Blood Heart Functions carry O 2 , waste, nutrients, hormones transfers body heat defense. Blood. Plasma (55%) 90% H 2 O 7% Protein (albumin, antibodies, enzymes, etc.

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Circulatory System

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  1. Circulatory System Biology 138

  2. Circulatory System Overview • Parts • Blood Vessels • Blood • Heart • Functions • carry O2, waste, nutrients, hormones • transfers body heat • defense

  3. Blood • Plasma (55%) • 90% H2O • 7% Protein (albumin, antibodies, enzymes, etc. • 3% food, waste, buffers, vitamins, salts, hormones, etc. • Solid (45%) • Erythrocytes • Leukocytes • Platelets

  4. Erythrocytes • Functions • O2 • made in marrow • live 120 days • hemoglobin

  5. Spleen • Functions • Removes old RBC’s (so does liver) • stores extra RBC’s

  6. Leukocytes • large • less numerous • nucleated • made in marrow • 5 types

  7. Types • Basophil • Neutrophil • most numerous • Eosinophil • Monocytes • Lymphocytes • B Cells • T Cells

  8. Platelets • Cell fragments • From Bone Marrow • Clot Blood • Contain blood clotting factors (12) • Short-lived

  9. Blood Types • A, B, AB, O • Rh factor • Erythroblastosis fetalis • Infant responds to attack on RBC’s by increasing RBC production, and sending out immature RBC’s, which you can see with their nuclei in the picture to the left

  10. Heart (External Anatomy)

  11. Heart (Internal Anatomy)

  12. Blood Flow Through The Heart

  13. Heartbeat Control

  14. Blood Vessels • Arteries • Arterioles • Capillaries • Venules • Veins

  15. Blood Flow Through Capillaries

  16. Blood Pathways Through The Body • Pulmonary • to lungs • Systemic • to body

  17. Lymphatic System • collects excess tissue fluid • similar to plasma, but no protein • vein like • no pump – skeletal muscle • drains into veins • lymph nodes filter fluid

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