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%) Solid (45%) 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 Eosinophil Monocytes Lymphocytes
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 vein like
similar to plasma, but no protein
vein like
no pump – skeletal muscle
drains into veins
lymph nodes filter fluid