1. Circulatory System

2. Blood The blood is made up of 4 basic parts: Plasma Red blood cells
White blood cells
Platelets

3. Functions of blood
Transportation
Protection
Regulation

4. Blood 55% plasma 45% red blood cells, white blood cells, platelets
The average adult human has 4 – 6 liters of blood in their body

5. Plasma Plasma – the clear, liquid part of the blood
Plasma is 90% water
It contains carbohydrates, proteins, lipids, wastes, enzymes, vitamins, salts, hormones, antibodies

7. Red Blood Cells RBCs carry oxygen and carbon dioxide
contain hemoglobin – an iron-containing protein that carries oxygen
Hemoglobin also gives blood its red color

9. White Blood Cells WBCs protect the body from bacteria and viruses
They are larger than red blood cells
When there is an infection, white blood cells collect in the infected area and attack the invading organism
2 types:
Lymphocytes – produce antibodies
Phagocytes – engulf the pathogen

10. Got Defense? In this electron micrograph, a human white blood cell is trapping bacterial cells. This type of cell defends the body against pathogens by engulfing them, delivering them to the lysosome of the cells, and destroying them with the help of the lysosomal enzymes.

11. Platelets
Platelets – cells or cell fragments involved in blood clotting
Platelets rupture and form a net that traps red blood cells

15. Blood Disorders
Anemia – a condition in which a person has too few red blood cells or an insufficient amount of hemoglobin

16. Blood Disorders (continued)
Leukemia – cancer of the white blood cells
Hemophilia – a hereditary disease in which you lack the ability to clot