Biology - Gr.11 🫀 (UNIT 4: SYSTEMS) - Circulatory system - The HEART, Cardiac Circulation, Cardiovascular disorders

Anatomy of a heart (label)

1. Aorta

2. Left pulmonary artery

3. Left atrium

4. Left pulmonary veins

5. Mitral Valve (Left atrium)

6. a) Aortic valve

   b) Pulmonary/semilunar valve

7. Left ventricle

8. Interventricular septum

9. Right Ventricle

10. Interior Vena cava

11. Tricuspid Valve

12. Right Atrium

13. Right pulmonary veins

14. Right pulmonary artery

15. Superior Vena Cava

16. Chordae Tendinae

17. Papillary Muscles

What is the average heart rate

72 bpm (70-100 bpm)

A heart can pump how much LITRES of blood? How about when exercising?

Litre: 5L , 25L when exercising

Cycle of contraction takes how many seconds?

0.8s

Diastole (what is it?)

→relaxation phase of the heartbeat where the atria and ventricles relax and fill with blood

Diastole (what’s the process)

1. Blood flows into atria

2. AV valves open

3. Blood flows into ventricles

Atrial systole (what is it?)

phase of the heartbeat when the atria (upper chambers) of the heart contract to push blood into the ventricles (the lower chambers).

Atrial systole (what’s the process?)

1. The wall of the atria contracts

2. The ventricles continnue to fill with blood

3. Valves open

70% of blood circulates by ____ to the ventricles

gravity

Ventricular systole (what is it?)

phase of the cardiac cycle when the ventricles (lower chambers) of the heart contract to pump blood out of the heart.

Ventricular systole (what’s the process

1. Ventricles contract, forcingg blood into the aorta and pulmonary artery AV Valves close

2. Semilunar Valves open