Circulatory pathways

Question 1

Which pump is the Left side of heart

Answer 1

systemic circuit pump

Question 2

Which pump is the right side of heart

Answer 2

pulmonary circuit pump

Question 3

Which circuit pumps more blood?

Answer 3

The volumes are equal at any given time, but ventricular workloads are unequal

Question 4

More information on the circuits

Answer 4

Pulmonary circuit is short and low pressure

Systemic circuit is much longer and has higher resistance

Question 5

In a schematic whats does the color of a vessel indicate

Answer 5

the level of oxygenation

Question 6

Which way do arteries carry blood, what type of blood and whats the exception

Answer 6

away from the heart

the blood is usually oxygen-rich, except in pulmonary trunk

Question 7

Which way do veins carry blood, what type of blood and whats the exception

Answer 7

to the heart

the blood is usually oxygen-poor, except in pulmonary veins

Question 8

How much of the body’s blood supply does the heart require

Answer 8

1/20th

Question 9

Blood in the heart chamber…

Answer 9

does not nourish the heart itself

Question 10

Coronary CIrculation

Answer 10

exists in the epicardium

they are the functional blood supply to the myocardium

Question 11

Right and Left Coronary Arteries

Answer 11

Arise from the base of the aorta and travel around the heart in the coronary sulcus

Question 12

Left Coronary Artery

Answer 12

serves the left side of the heart

Question 13

Anterior Interventricular Artery (Left Anterior Descending Artery)

Answer 13

follows the anterior interventricular sulcus, supplies blood to the anterior walls of both ventricles + the interventricular septum

“The Widow Maker”

Question 14

Circumflex artery

Answer 14

supplies the left atrium and the posterior wall of the left ventricle

Question 15

Right Coronary Artery

Answer 15

serves the right side of the heart

Question 16

Right Marginal Artery

Answer 16

supplies the myocardium of the lateral right side of the heart

Question 17

Posterior Interventricular Artery

Answer 17

supplies the apex of the heart and the posterior ventricular walls

Question 18

Where do the anterior and posterior interventricular artery merge?

Answer 18

The heart’s apex

Question 19

What percent of the coronary artery supply both interventricular arteries

Answer 19

15%

Question 20

What percent of people does a single artery supply to the whole heart

Answer 20

4%

Question 21

Myocardial Infarction

Answer 21

complete blockage of a coronary artery leads to tissue death usually called a “heart attack”

myocardial cells are cut off from blood supply and die

dead cells are replaced by non contractile scar tissue

prolonged coronary blockage of the vessels supplying the left ventricle is the most likely to be fatal

Question 22

Blood flow through coronary arteries

Answer 22

Is intermittent and pulsating

when the ventricles are relaxed, blood flows into the myocardium

when the ventricles contract, the coronary arteries are compressed, and flow is temporarily ceased

Question 23

Angina Pectoris

Answer 23

thoracic pain caused by a fleeting deficiency in blood supply to myocardium

causes: increased physical demands on the heart, stress induced spasms of the coronary arteries

myocardial cells will be weakened, but they will not die

Question 24

Coronary veins

Answer 24

after passing through the myocardium’s capillary beds, venous blood is collected by cardiac veins

the path of the cardiac veins roughly follows the coronary arteries

cardiac veins merge to form the coronary sinus

Question 25

where does the coronary sinus drain into

Answer 25

right atrium

Question 26

what are the three tributaries of the coronary sinus

Answer 26

great cardiac vein from the anterior interventricular sulcus

middle cardiac vein from the posterior interventricular sulcus

small cardiac veins from the right inferior margin

Question 27

what directly empties directly into the right atrium

Answer 27

anterior cardiac veins