1. Circulatory System

2. Functions of the Circulatory System
Blood carries oxygen and nutrients to the cells in the body
Blood picks up carbon dioxide and carries it away from the cells to the lungs
Blood picks up other waste and these are filtered out of the blood by the kidneys

3. Movement of materials into and out of the blood
Diffusion- movement of materials from high to low concentration
Active transport – requires energy, usually large molecules or from low to high concentrations

4. Organs and their functions
Heart – causes blood to move through the body by its pumping action

6. Organs and their functions
Blood Vessels – tubes that carry blood throughout the entire body; made of smooth muscle and connective tissue
Arteries- vessels that carry blood away from the heart,
Veins- carries blood back to the heart
Capillaries – small vessels only one cell thick; where gas exchange occurs between the blood and cells

7. Capillaries – exchanges gases and nutrients with cells
oxygen
CO2
nutrients

10. Organs and their functions
Blood
Carries the oxygen from the lungs to the cells
Carries carbon dioxide from the cells to the lungs to be exhaled
Carries nutrients to your cells
Helps fight infections and heal wounds
Contains red and white blood cells, platelets, and plasma

12. Companion Systems
Digestive – the circulatory system carries the nutrients that the digestive system absorbs
Respiratory – the circulatory system carries the oxygen the respiratory system takes in and carries CO2 to the lungs to be exhaled
Excretory -