Heart Structure

Question 1

atria

Answer 1

the top chambers in the heart that collect blood from veins

Question 2

ventricles

Answer 2

the bottom chambers in the heart that pump blood into arteries

Question 3

which side of the heart contins oxygenated blood

Answer 3

left

Question 4

which side of the heart contains deoxygenated blood

Answer 4

right

Question 5

how many pumping mechanisms does the heart have

Answer 5

2

Question 6

what are the 3 reasons having 2 pumping mechanisms is required

Answer 6

• blood pressue drops in the lungs as it flows through the capillaries
• a single pump would slow the blood flow to the body cells
• two pumps increase the pressure before the blood circulates

Question 7

what is the purpose of the septum in the heart

Answer 7

it separates the two sides of the heart which prevents oxygenated and deoxygenated blood from mixing

Question 8

what are the 2 atrioventricular valves

Answer 8

• tricuspid valve
  -bicuspid valve

Question 9

what is the other type of valve that is not atrioventricular

Answer 9

semi-lunar

Question 10

where is the tricuspiud valve located and what is the purpose

Answer 10

located between the right atrium and right ventricle

prevents the backflow of blood into the atria when the ventricles contract

Question 11

where is the bicuspid valve located and whats its purpose

Answer 11

located between the left atrium and left ventricle

prevents the backflow of blood into the atria when the ventricles contract

Question 12

where are the semi-lunar valves located and what do they do

Answer 12

located between the ventricles and pulmonary artery and aorta

they prevents the backflow of the blood into the ventricles when they relax

Question 13

what is the role of the pulmonary vein

Answer 13

moves oxygenated blood into the left atrium from the lungs

Question 14

role of the aorta

Answer 14

moves oxygenated blood from the left ventricle to the body

Question 15

role of the vena cava

Answer 15

moves deoxygenated blood into the right atrium from the body

Question 16

role of the pulmonary artery

Answer 16

moves deoxygenated blood from the right ventricle to the lungs

Question 17

are the ventricle walls or are the atria walls thicker

Answer 17

ventricle

Question 18

why are the ventricle walls thicker than the atria walls

Answer 18

the atria only needs enough pressure to pump the blood a short distancxe into the ventricles whereas the ventricles need a lot of pressure to pump blood a larger distance out of the heart and into other organs

Question 19

which side of the ventricle wall is thicker

Answer 19

left

Question 20

why is the left ventricle wall thicker than the right

Answer 20

the right ventricle only needs enough pressure to pump deoxygenated blood a short distance to the lungs whereas the left needs a lot of pressure to pump oxygenated blood to the other more distant organs of the body