Circulatory System

Question 1

What colour are veins represent as

Answer 1

Blue

Question 2

What colour are arteries represented as

Answer 2

Red

Question 3

Which side are arteries found

Answer 3

Left side in body but right on diagrams

Question 4

Which side are vines found

Answer 4

Right side in Body but left side in diagrams

Question 5

What are the main two arteries in the heart

Answer 5

1) pulmonary artery
2) aorta

Question 6

What are the main two veins in the heart

Answer 6

1) pulmonary vein
2) vena cava

Question 7

What does the pulmonary artery do

Answer 7

It brings oxygenated blood from the lungs into the heart

Question 8

What does the aorta do

Answer 8

It brings oxygenated blood from the heart to the rest of the body

Question 9

What does the pulmonary vein do

Answer 9

It brings the deoxygenated blood from the heart to the lungs

Question 10

What does the vena cava do

Answer 10

It bring deoxygenated blood from the body to the heart

Question 11

What are the properties of arteries

Answer 11

1) thick outer wall
2) small lumen
3) thick layer of muscle and elastic fibres
4) smooth inner lining

Question 12

Why do arteries have thick outer walls and thick layers of muscles

Answer 12

to withstand high pressure of blood flowing from heart

Question 13

Properties of veins

Answer 13

1) fairly thin outer walls
2) thin layer of muscle and elastic fibres
3) large lumen
4) smooth lining

Question 14

Properties of capillaries

Answer 14

1) wall made of single layer cells
2)very small lumen

Question 15

Why is the outer wall of capillaries only one cell thick

Answer 15

To allow substances to diffuse in and out through them to link the arteries and veins

Question 16

Why do the pulmonary artery and aorta cross over?

Answer 16

Because we have two lungs and we have a double circulatory system

Question 17

What does it mean to have a double circulatory system

Answer 17

It means that the blood travels through the heart twice to complete its journey once, and has two different circuits for oxygenated and deoxygenated blood

Question 18

Why do we have a double circulatory system

Answer 18

We are larger organisms, so blood needs to around the body quicker, and the double circulatory system provides a more efficient way of transporting oxygen and nutrients to the body. It allows for a greater volume of blood to be pumped with each heartbeat, which provides tissues with more oxygen and nutrients.

Question 19

What substances are transported in blood

Answer 19

Red blood cells
White blood cells
Plasma
Platelets

Question 20

What do red blood cells do?

Answer 20

They are small biconcave cells that have no nucleus. They contain haemoglobin and carry oxygen around the body.

Question 21

What are white blood cells

Answer 21

Large cells that contain a nucleus, they fight disease by making antibodies, or by changing shape to engulf other microorganisms

Question 22

What is plasma

Answer 22

straw-coloured liquid that blood cells float in.
Over 90% of plasma is water. Many materials are transported by being dissolved in plasma. These include digested food (such as amino acids and glucose), waste (such as carbon dioxide), hormones, and antibodies.

Question 23

What are platelet

Answer 23

Tiny structures that help to clot blood, which prevents further infections in wounds or injuries

Question 24

When haemoglobin binds to oxygen what does it become

Answer 24

Oxyhemoglobin

Question 25

What chemicals is heamoglobin made out of

Answer 25

porphyrin + iron atom