Structure and Function of the Heart

Question 1

List all of the parts of the heart

Answer 1

Aorta
superior vena cava
pulmonary artery
pulmonary vein
right atrium
tricuspid valve
right ventricle
inferior vena cava
pulmonary valve
left atrium
bicuspid valve
aortic valve
left ventricle

Question 2

what is the function of the aorta?

Answer 2

takes oxygenated blood from the left ventricle to the body cells main artery in body

Question 3

what is the function of the vena cava?

Answer 3

takes deoxygenated blood from the body to the right atrium

Question 4

what is the function of the pulmonary artery?

Answer 4

takes deoxygenated blood from the right ventricle to the lungs

Question 5

what is the function of the pulmonary veins?

Answer 5

(only time a vein will carry oxygenated blood)

takes oxygenated blood from the lungs to the left atrium

Question 6

what is the function of the right atrium?

Answer 6

chamber that receives deoxygenated blood from body cells

Question 7

what is the function of the tricuspid valve?

Answer 7

stops the backflow of blood from the right ventricle into the right atrium when the ventricle contracts

Question 8

what is the function of the right ventricle?

Answer 8

receives blood from the right atrium

Question 9

what is the function of the pulmonary valve?

Answer 9

stops the backflow of blood into the right ventricle from the pulmonary artery

Question 10

what is the function of the left atrium?

Answer 10

chamber that receives oxygenated blood from the lungs

Question 11

what is the function of the bicuspid valve?

Answer 11

stops the backflow of blood from the left ventricle into atrium when the ventricles contract

Question 12

What is the function of the aortic valve?

Answer 12

stops the backflow of blood into the left ventricle from the aorta

Question 13

what is the function of the left ventricle?

Answer 13

receives blood from the left atrium

Question 14

what side of the heart does systematic circulation take part on?

Answer 14

left

Question 15

what side of the heart does pulmonary circulation take part on?

Answer 15

right

Question 16

what is an ECG and what does it do?

Answer 16

an electrocardiogram
it takes a reading of your heart, leads from the machine are attached to your body on your legs arms and chest and it reads signals of your heart while sending information to the electrocardiograph

Question 17

what is the healthy beat of a heart?

Answer 17

PQRST

Question 18

Define myogenic (what the heart muscle is)

Answer 18

originating in muscle tissue (rather than from nerve impulses).

Question 19

What does it mean if the heart is myogenic?

Answer 19

It has the ability to create its own electrical impulses that pass through the muscular walls, forcing them to contract

Question 20

What is the conduction system?

Answer 20

The electrical conduction system of the heart transmits signals generated usually by the sinoatrial node to cause contraction of the heart muscle.

Question 21

How many structures are in the conduction system?

Answer 21

5
sinoatrial node
atrioventricular node
bundle of his
bundle branches
porcine fibres

Question 22

What does the sinoatrial node do?

Answer 22

SA node is located in the right atrial wall and generates the electrical impulse and fires it through the atrial walls causing them to contract. The pacemaker firing rate determines the heart rate

Question 23

what does the atrioventricular node do?

Answer 23

AV node gets the impulse and delays it to allow the atria to finish contracting and it then releases it to the bundle of his

Question 24

what does the bundle of his do?

Answer 24

it is located in the septum and the bundle of his splits the impulse into two so that it is ready to be distributed into each ventricle

Question 25

what do the bundle branches do?

Answer 25

carry the impulse to the base of each ventricle

Question 26

what does the purkyne fibres do?

Answer 26

they distribute the impulse through the ventricle walls causing them to contract once the electrical impulses journey is complete the atria and ventricles relax

Question 27

what number is your diastole blood pressure? What does it measure?

Answer 27

the bottom number it measures the force of blood against your artery walls as your heart relaxes and the ventricles are allowed to refill with blood defined as period of ventricular relaxation

Question 28

what number is your systole blood pressure? what does it measure?

Answer 28

the top number it measures the force of blood against your artery walls while your ventricles squeeze and push out blood to the rest of the body

Question 29

what is hypertension?

Answer 29

high blood pressure

Question 30

what is hypotension?

Answer 30

low blood pressure

Question 31

what is considered a normal blood pressure reading?

Answer 31

120/80

Question 32

What is the difference between the atrioventricular and semilunar valves?

Answer 32

The atrioventricular valves allow blood to pass from the atria to the ventricles The semilunar valves open to let blood pass out of the ventricles