1. Anatomy-Cardiovascular System
Characteristics & Functions of the Cardiovascular System

2. Anatomy-Cardiovascular System Introduction
Grab a note taker from the front table
NEW SEATS! 

3. Anatomy-Cardiovascular System Objectives
Students will be able to:
Define terms relative to the cardiovascular system.
Describe the basic characteristics & functions of the cardiovascular system.

4. Anatomy-Cardiovascular System Terminology
Heart
Vascular
Vessels that circulate blood
Oxygenated
High oxygen level
Deoxygenated
Low oxygen level

5. Anatomy-Cardiovascular System Circulatory System
Circulates blood through the body
Closed system
Heart & blood vessels

6. Anatomy-Cardiovascular System Heart
Chambered muscular organ
Pumps blood throughout the body
Receives deoxygenated blood through veins
Pumps oxygenated blood through arteries

7. The Lungs Location: Functions: On either side of the heart
Exchange carbon dioxide for oxygen
Help to remove heat from the body

8. The heart Location: Function:
Under the sternum (slightly to the left) and between the lungs
Function:
to pump blood throughout the body
Blood carries oxygen and nutrients to the cells
Blood carries carbon dioxide and waste products away from the cells

9. The Heart Divided into 4 chambers
R and L atrium (upper chambers)
R and L ventricles (lower chambers)
Heart valves separate each chamber and prevent a backflow of the blood
Tricuspid valve
Biscuspid (mitral) valve
Pulmonary valve
Aortic valve

10. Anatomy-Cardiovascular System Heart

11. How does the blood flow through the Heart?
Right Side of Heart
Left Side of Heart
The pulmonary veins empty oxygen-rich blood from the lungs into the left atrium of the heart.
As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve.
When the ventricle is full, the mitral valve shuts. This prevents blood from flowing backward into the atrium while the ventricle contracts.
As the ventricle contracts, blood leaves the heart through the aortic valve, into the aorta and to the body.
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart.
As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
When the ventricle is full, the tricuspid valve shuts. This prevents blood from flowing backward into the atria while the ventricle contracts.
As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs, where it is oxygenated and then returns to the left atrium through the pulmonary veins.

12. How blood flows through the lungs
Once blood travels through the pulmonic valve, it enters your lungs. This is called the pulmonary circulation. From your pulmonic valve, blood travels to the pulmonary artery to tiny capillary vessels in the lungs.
Here, oxygen travels from the tiny air sacs in the lungs, through the walls of the capillaries, into the blood. At the same time, carbon dioxide, a waste product of metabolism, passes from the blood into the air sacs. Carbon dioxide leaves the body when you exhale. Once the blood is purified and oxygenated, it travels back to the left atrium through the pulmonary veins.

13. Anatomy-Cardiovascular System Blood Flow

14. Anatomy-Cardiovascular System Blood Vessels
Elastic tubes
Carry blood
Arteries
Arterioles
Capillaries
Venules
Veins
Arteries
Veins

15. Anatomy-Cardiovascular System Arteries
Muscular, thick, elastic blood vessels
Carry oxygenated blood away from the heart to body cells, tissue & organs
Except for pulmonary artery
artery

16. Anatomy-Cardiovascular System Arterioles
Small terminal branches of arteries
Connect arteries to capillaries
arteriole
artery

17. Anatomy-Cardiovascular System Capillaries
Very small blood vessels
Connect arterioles to venules
arteriole
artery
capillary

18. Anatomy-Cardiovascular System Venules
Small veins
Connect capillaries to larger veins
venule
arteriole
artery
capillary

19. Anatomy-Cardiovascular System Veins
Thin walled blood vessels
Carry deoxygenated blood to the heart from body cells, tissue & organs
Except for pulmonary vein
venule
arteriole
artery
vein
capillary

20. Anatomy-Cardiovascular System Write 3 Things You Learned

21. Direction blood pumps through the heart