Sheep Heart Dissection Mr. Ditolla/Life Science

Examine the exterior or outside surface of the heart. 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. large blood vessels entering and leaving the heart surface blood vessels

blood vessels entering 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. surface blood vessels blood vessels entering and leaving the heart

Turn the heart over and examine the interior of the Heart Interior Turn the heart over and examine the interior of the heart. Notice there are four chambers or compartments in the heart. The bottom chambers are much larger than 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 low in oxygen comes from the body and enters Blood Circulation Blood low in oxygen comes from the body and enters the right atrium. The right atrium contracts and pushes 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 surface 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 lungs? 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 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.