How Heart Works. Blood 4 lesson

Hey everyone. Here is new biology lesson on Heart. What do you know about it? OK. Now, check if you can answer these questions:

1. Describe the location and position of the heart within the body cavity
2. Describe the internal and external anatomy of the heart
3. Identify the tissue layers of the heart
4. Relate the structure of the heart to its function as a pump
5. Compare systemic circulation to pulmonary circulation
6. Identify the veins and arteries of the coronary circulation system
7. Trace the pathway of oxygenated and deoxygenated blood thorough the chambers of the heart

Could you?

Blood flows from the right atrium to the right ventricle, where it is pumped into the pulmonary circuit. The blood in the pulmonary artery branches is low in oxygen but relatively high in carbon dioxide. Gas exchange occurs in the pulmonary capillaries (oxygen into the blood, carbon dioxide out), and blood high in oxygen and low in carbon dioxide is returned to the left atrium. From here, blood enters the left ventricle, which pumps it into the systemic circuit. Following exchange in the systemic capillaries (oxygen and nutrients out of the capillaries and carbon dioxide and wastes in), blood returns to the right atrium and the cycle is repeated.

The heart wall also consists of three layers

Check if you can answer questions at the beginning.