4. The Heart

Question 1

What type of blood does the right side of the heart pump ?

Answer 1

Deoxygenated blood

To lungs

Represented in blue

Question 2

What type of blood does the left side of the heart pump ?

Answer 2

Oxygenated blood

To whole body

Represented in pink/red

Question 3

Label parts of the heart on the right side ?

Answer 3

Superior vena cava
Inferior vena cava

Right atrium

Right AV valve

Right ventricle

Right semi lunar valve

Pulmonary artery

Question 4

Label parts of the left side of the heart?

Answer 4

Pulmonary vein

Left atrium

Left AV valve

Left ventricle

Left Semi lunar valve

Aorta

Question 5

What returns deoxygenated blood to heart ?

Answer 5

Vena cava

Major vein

Question 6

Where does the pulmonary artery take blood ?

Answer 6

Lungs

Deoxygenated blood

Question 7

Where does the pulmonary vein take the blood?

Answer 7

From lungs to heart

Oxygenated blood

Question 8

Difference between left and right ventricle

Answer 8

Left - larger muscle as needs to contract to pump blood around whole body.

Right - not as large but have larger volume. Only need to contract to pump blood to nearby lungs.

Question 9

What is cardiac conservation also called ?

Answer 9

Systole

Question 10

When is cardiac relaxation called ?

Answer 10

Diastole

Question 11

1. Ventricles relax (diastole)

And

Atria contract (systole)

Answer 11

Ventricles relaxed and atria contract.

This decrease the volume inside atria but pressure inside chambers increases.

This pushes blood into ventricles.

Causes slight ventricular pressure increase and chamber volume and it revived blood from contracting atria.

Question 12

2. Ventricles contract ( systole)

And

Atria relax (diastole)

Answer 12

Aria relax and ventricles contract.
This decreases their volume and increases their pressure.

Pressure higher in ventricles than in atria which forces AV values shut to prevent back flow.

Pressure is also higher in ventricles than in pulmonary artery and aorta so Semi lunar valves open and blood is forced out into these arteries.

Question 13

3. Cardiac diastole

Ventricles relax

And

Atria relax

Answer 13

Both relax.

Higher pressure in Partery and aorta causes SL valves to be forced shut to prevent back flow.

Blood returns to heart into vena cava and p- Vein to fill atria with blood due to higher pressure here.
This increases pressure in atria.
Ventricles continue to relax as their pressure falls below the pressure of the atria.
AV valves then open.
Blood flows passively without being pushed by contraction into ventricles from atria. Process begins again