Circularoty System Flashcards Preview

Biology AS > Circularoty System > Flashcards

Flashcards in Circularoty System Deck (13):
1

What is the circulatory system made up of

The heart and blood vessels

2

Name the 4 types of blood vessels

Arteries
Arterioles
Veins
Capillaries

3

Where does the pulmonary artery carry blood from and to

From- heart
To- lungs

4

Where does the pulmonary vein carry blood from and to

From- lungs
To- heart

5

Where does the aorta carry blood from and to

From- heart
To- body

6

Where does the vena cava carry blood from and to

From- body
To- heart

7

Where does the renal artery carry blood from and to

From- body
To- kidneys

8

Where does the renal vein carry blood from and to

From- kidneys
To- vena cava

9

Why do multicellular organisms need a circulatory system

Because they have a low surface area to volume ratio

10

Why do arteries have elastic tissue

To stretch and recoil as the heart beats which helps maintain the high pressure

11

Why is the inner lining (endothelium) in arteries folded

So the arteries can stretch, helping to maintain high pressure

12

What do arteries divide into

Arterioles

13

Why do veins have valves

To stop blood flowing backwards