Stricture Of The Heart

Question 0

What is the heart enclosed in?

Answer 0

A pericardial sac.

Question 1

What is the human heart?

Answer 1

A four-chambered muscular organ.

Question 2

Looking at a picture of a basic heart diagram what is on the right hand side?

Answer 2

left atrium at the top & the left ventricle at the bottom

Question 3

Looking at a basic diagram of the heart what is on the left hand side?

Answer 3

Right atrium at the top & right ventricle at the bottom

Question 4

What do veins do?

Answer 4

Take blood back to the heart.

Question 5

What are the two atria’s?

Answer 5

thin-walled chambers that receive blood from the veins.

Question 6

why do the two ventricles have thicker walls?

Answer 6

because the blood pumps with more pressure.

Question 7

What is systole?

Answer 7

where the muscle chambers of the heart contract

Question 8

What is diastole?

Answer 8

where the muscle chambers of the heart relax

Question 9

When the atrium systole contracts (squeezing blood into ventricles) what do the ventricles do?

Answer 9

Relax (diastole)

Question 10

When ventricles systole they squeeze blood into the arteries taking blood away from the heart, what do the atriums then do?

Answer 10

Relax (diastole)

Question 11

When atriums are full, what are ventricles?

Answer 11

Empty

Question 12

When ventricles are full, what are atriums?

Answer 12

Empty

Question 13

There are trapdoors between Atriums and Ventricles, what are they called?

Answer 13

Tricuspid & bicuspid. (Tri before you Bi)

Question 14

What does the septum do?

Answer 14

Separate the tricuspid and bicuspid valves.

Question 15

When atriums fill up, a signal is sent down what?

Answer 15

The septum to signal the other parts to do their job.

Question 16

Does the pulmonary vein bring oxygenated blood to the heart from the lungs?

Answer 16

yes

Question 17

The blood from the pulmonary vein goes into the left or right atrium?

Answer 17

Left

Question 18

From the pulmonary vein to atrium then ventricle (left), where does the blood then go?

Answer 18

Into an artery called the Aorta.

Question 19

From the Aorta where does the blood go?

Answer 19

All around the body.

Question 20

What artery is under the most pressure?

Answer 20

The aorta

Question 21

which side has lower CO2 and oxygenated blood?

Answer 21

Left side. (Looking at it, on the right side).

Question 22

Which side has the highest CO2 and deoxygenated blood?

Answer 22

The right side. (Looking at it, the left side).

Question 23

When deoxygenated blood returns the heart after being around the body, where does it come through?

Answer 23

The vena cava

Question 24

The timing of the cardiac cycle is controlled by what?

Answer 24

The SAN

Question 25

what is the SAN?

Answer 25

part of the heart muscle that acts as a pacemaker

Question 26

Does the SAN muscle send impulses over the atrial walls to cause both atriums to contract?

Answer 26

Yes

Question 27

What does the SEPTUM stop?

Answer 27

impulses from the SAN muscle going straight to the ventricles.