Sheep's Heart Dissection

Video Lessons to Guide Instruction

This dissection lesson was developed by Yvonne Tryce, Science Resource Teacher for the Los Altos Unified School District. In this lesson, students follow the path of blood through the heart.

Preparation
If hearts arrive frozen, they will need to be defrosted by leaving them in the refrigerator for several days, or at room temperature overnight. Tables should be covered with two layers of newspaper or butcher paper. Each pair of students will need dissecting scissors and a thick handled blunt probe.

1. Pericardium

7. Pulmonary Valve and Vein
2.Vena Cava 8. Arteries and Veins
3. Right Atrium 9. Left Atrium
4. Right Ventricle 10. Left Ventricle
(Note: Movie Error - Left, not right, atrium)
5. Tricuspid Valve 11. Aorta and Aortic Valve
6. Pulmonary Artery 12. Path of blood through heart