Circulatory System

Question 1

Diagram of heart

Left to right

Answer 1

Vena cava
Pulmonary artery
Aorta
Pulmonary vein

Question 2

Types of blood vessel

Answer 2

Artery
Vein
Capillary

Question 3

Artery

Answer 3

Thick walls
No valves
Narrow lumen

Carry blood away from heart

High pressure
Oxygen rich

Question 4

Vein

Answer 4

Think walls
Have valves
Large lumen

Carry blood to heart

Low pressure
Oxygen poor

Question 5

Capillaries

Answer 5

Thin walls

Connect arteries to veins

Allow exchange of materials

Question 6

Portal blood system

Answer 6

Blood pathway that begins and ends in capillaries
Eg. Hepatic portal vein
Doesn’t go back to heart

Question 7

LORD (heart)

Answer 7

Left oxygenated right deoxygenated

Question 8

Valves

Answer 8

Prevent backflow of blood

Question 9

Systole

Answer 9

Heart chambers contracts

Question 10

Diastole

Answer 10

Heart chambers relaxed

Question 11

Pulse

Answer 11

Alternate expansion and contraction of the arteries

Question 12

Blood pressure

Answer 12

Force of blood against the walls of blood vessels
120
——- mm Hg
80.