1. Please write in complete sentences!
Bell Ringer/Do Now – 02/01/19
What is the job of the cardiovascular system?
Please write in complete sentences!

2. Cardiovascular System
Mrs. Hill

3. Cardiovascular System
- Cardio- Heart
- Vascular- Blood Vessels

4. Circulatory Functions
To move, circulate, blood around the body.
To transport; oxygen, nutrients, and waste around the body.

5. Heart Structure Strongest muscle in the body
Located close to the middle of the chest

6. Heart is made up of 3 layers
Pericardium (outer layer)
- Fluid filled sac that cushions the heart
and prevents irritation

7. Myocardium (bulk of the heart)
- Specially constructed muscle tissue
cardiac muscle

8. Endocardium (heart lining)
- Tissue that lines the chambers of the
heart and the valves of the heart

9. The heart is divided into 4 chambers
Atrium (upper two chambers)
-blood enters the heart into these chambers
Ventricles (lower two chambers)
-blood exits the heart from these
-chambers are larger and have thicker
walls
-left ventricle has the thickest walls

10. Valves (permit) the flow of blood in one direction
Tricuspid valve
Between the rt atrium and rt ventricle
Mitral valve (bicuspid)
Between left atrium and left ventricle
Semilunar Valves
- Located inside the pulmonary artery and aorta

11. Blood Vessels Arteries - carries blood away from the heart
- all arteries carry oxygenated blood,
except for the pulmonary artery

12. Veins
- carry blood back to the heart
- all veins carry deoxygenated blood,
except for pulmonary veins

13. Capillaries
- attach small arteries to small veins
- 1 mil long, 25 to make an inch, joined
end to end would extend 62,000 miles
- allow the transfer of oxygen, nutrients,
and waste between cells of the body
and blood
- this transfer, diffusion, occurs here
because the walls are only one cell thick

14. Circulatory Problems Heart Disease (Coronary Artery Disease)
Heart Attack- blood supply to the heart is reduced or stopped
Cardiac Arrest- heart stops beating
Hypertension- abnormally high blood pressure in arteries, may increase the chance of a heart attack or stroke

15. Problems
Leukemia-a cancer of the tissue of the body that produces WBC’s
Anemia-number of RBC’s or hemoglobin is below normal
Hemophilia- a genetic disease in which blood doesn’t clot or clots very slowly
Sickle Cell Anemia-genetic condition, were RBC’s clump together