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Arteries carry blood which is oxygenated - veins carry blood which is deoxygenated.
Unit 3 - Blood
In GCSE Biology, you explore how blood transports substances, defends against disease, and helps maintain a healthy body so every organ gets the materials it needs.
1 .
Blood plasma is...
solid
liquid
gas
inert
It has a pale straw colour
2 .
Plasma carries carbon dioxide away from the...
lungs
organs
platelets
valves
The carbon dioxide is a waste product of respiration
3 .
Arteries carry blood in which direction?
Towards the heart
From atria to venticles
Away from the heart
Away from the organs
The aorta and pulmonary arteries carry blood away from the heart
4 .
Valves prevent the backflow of blood and are found in which of the following?
In the arteries
In the capillaries
In the liver
In the veins
Veins contain valves. Exceptions are the semi lunar valves at the top of the heart inside the aorta and pulmonary artery. These prevent backflow of blood back into the heart
5 .
What are the smallest blood vessels, requiring a microscope in order to be seen?
Arteries
Veins
Capillaries
Lymphatic vessels
They ensure that every cell in your body receives a supply of blood
6 .
Which parts of the circulatory system have thin walls, allowing diffusion of gases?
Arteries
Veins
Capillaries
Atria and ventricles
This allows the exchange of carbon dioxide and oxygen with the blood
7 .
Most arteries carry blood which is...
deoxygenated
red
blue
oxygenated
Textbooks use red and blue in diagrams to show oxygenated (red) and deoxygenated (blue) blood. The blood in arteries is just a different shade of red compared with the blood inside veins
8 .
Which of the following is another name for a red blood cell?
Erythrocyte
Leucocyte
Platelet
Antibody
They contain the protein haemoglobin which carries oxygen round the body
9 .
Platelets are involved in blood...
flow
renewal
clotting
oxygen levels
They combine with chemicals in the blood plasma called clotting factors
10 .
Red blood cells have a special shape to allow maximum...
surface area for diffusion
volume for water
density for floating
area and volume
Having a large surface area to volume ratio allows the oxygen to be absorbed more efficiently in the lungs
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