Heart

Question 1

Vena carva

Answer 1

Deoxygenated blood from body to RA

Question 2

Pulmonary vein

Answer 2

Carries oxygenated blood lungs to LA

Question 3

Structure of atrias

Answer 3

Thinner muscular wall - only deliver blood to ventricles so don’t have to contract as forceful
Elastic walls stretch as full up with blood

Question 4

Ventricles structure

Answer 4

LV thicker muscular wall then RV deliver blood to respiring cells contract more forcefully

Question 5

Cardiac muscle

Answer 5

Walls of heart have a thick muscular layer
Heart = myogenic contract and relax without stim
Never fatigues as long as has oxygen

Question 6

Coronary arteries

Answer 6

Supply cardiac muscle with oxygenated blood
If become blocked = heart attack

Question 7

Name two veins in the heart

Answer 7

Pulmonary vein
Vena carva

Question 8

Name two arteries in heart

Answer 8

Pulmonary artery
Aorta

Question 9

Pulmonary artery

Answer 9

Deoxygenated blood from RV to lungs to become oxygenated

Question 10

Aorta

Answer 10

Oxygenated blood from LV to rest of the body

Question 11

Name two valves

Answer 11

Semi lunar
Atrioventricular

Question 12

Role of valves

Answer 12

Prevent back flow of blood
Open when pressure higher behind valve
Close when pressure is higher in front

Question 13

Septum

Answer 13

Separate deoxygenated blood and oxygenated blood
Maintains high conc of oxygen

Question 14

Arterioles

Answer 14

Smaller than arteries connect to capillaries

Question 15

Capillaries

Answer 15

Connect the arterioles to veins

Question 16

Veins

Answer 16

Carry blood back into heart

Question 17

Artery

Answer 17

Carry blood away from heart

Question 18

Arteries vs veins

Answer 18

Muscle layer Thicker vs thinner

Elastic layer
Thicker walls can stretch and recoil vs thinner - lower pressure

Wall thickness
Thicker - prevent vessels from bursting due to high pressure vs thinner low pressure

Valves
No vs yes

Lumen
Smaller vs winder

Question 19

Capillaries

Answer 19

One cell thick provide short diffusion pathway
No valves
No muscle layer
No elastic layer

Question 20

Diastole

Answer 20

Atria + ventriclar muscle relaxed
Blood travels down vena cava to atria
Blood flow into atria increases the pressure

Question 21

Atrial systole

Answer 21

Atria muscle contracts increases pressure
AV valves open and blood flow into ventricles
Ventricular walls relaxed

Question 22

Ventricular systole

Answer 22

Short delay
Ventricle muscular walls contract increases pressure
AV valve close semi lunar valve open
Blood pushed out ventricles into arteries

Question 23

Cardiac output

Answer 23

Cardiac output = heart rate x stroke vol