Transcript blood vessels enter

Sheep Heart Dissection
Mr. Ditolla/Life Science
Heart Exterior
Examine the exterior or outside surface of the heart.
Locate the blood vessels on the surface of the heart
and the places where blood vessels enter and leave
the heart. Look at the picture below to help you.
surface blood vessels
large blood vessels
entering and leaving
the heart
The blood vessels on the surface of the heart carry
blood to the cells of the heart. The larger blood
vessels entering and leaving the heart carry blood
to and from the heart. There are six blood vessels
entering and leaving the heart.
blood vessels entering
and leaving the heart
surface blood
vessels
Heart Interior
Turn the heart over and examine the interior of the
heart. Notice there are four chambers or compartment
in the heart. The bottom chambers are much larger th
the top chambers.
top chambers
bottom chambers
The chambers on the top are called atriums and the
chambers on the bottom are called ventricles. Two
blood vessels enter each atrium and one blood vessel
leaves each ventricle. The atrium and ventricle on
each side are connected by a valve. The valve only
allows the blood to flow in the correct direction, from
the atrium to the ventricle.
atrium
valve
ventricle
Blood Circulation
Blood low in oxygen comes from the body and enters
the right atrium. The right atrium contracts and pushe
the blood into the right ventricle. The right ventricle
contracts and sends the blood to the lungs to pick up
oxygen and get rid of carbon dioxide.
right atrium
right ventricle
After the blood leaves the lungs, it travels back to the
left atrium. The left atrium contracts and sends the
blood to the left ventricle. The left ventricle contracts
and sends the blood out of the heart to deliver oxygen
to all the cells of the body.
left atrium
left ventricle
Questions & Conclusions
1. What is the function of the blood vessels on the surfa
of the heart?
2. How many blood vessels enter and leave the heart?
3. How many chambers or compartments are there in
the heart?
4. Which chambers are larger, the top or bottom?
5. How many blood vessels enter each atrium?
6. How many blood vessels leave each ventricle?
7. Are the atrium and ventricle on each side connected
8. Where are the valves located?
9. What is the function of the valves?
10. Where does blood low in oxygen enter the heart?
11. Where does the blood go after it leaves the right
atrium?
12. Where does the blood go after it leaves the right
ventricle?
13. What does the blood pick up when it is in the lungs
14. What does the blood get rid of when it is in the lun
15. Where does the blood go after it leaves the lungs?
16. Where does the blood go after it leaves the left
atrium?
17. Where does the blood go after it leaves the left
ventricle?
18. What does the blood deliver to all the cells of the
body?
*Label the diagram showing the structure of the heart
and the circulation of blood through the heart. Use
the diagram on the board to help you.