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Download this complete,fully solved and updated actual exam for Physics Unit 2 CCEA GCSE
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Blood Carries oxygen and nutrients to the body's cells, and waste products away from them. Arteries Carry blood away from the heart.Very thick, elastic walls. Small lumen High blood pressure.No valves.The muscle provide strength and allow the arteries to expand as blood is pulsed through, ...

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  • July 13, 2024
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  • 2023/2024
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Download this
complete,fully
solved and
updated actual
exam for CCEA
GCSE DAS
Biology Unit 2:
Circulatory
System
Blood - answer Carries oxygen and nutrients
to the body's cells, and waste products away
from them.

, Arteries - answer Carry blood away from the
heart.Very thick, elastic walls. Small lumen
High blood pressure.No valves.The muscle
provide strength and allow the arteries to
expand as blood is pulsed through, preventing
them from bursting. The elastic fibres recoil
and muscles contract returning the wall to its
original size and smoothing out the blood


Veins - answer Return blood to the heart.
Relatively thin walls.
Large lumen that reduces friction
Low blood pressure.
Has valves to prevent back-flow of blood.


Capillaries - answer Walls are thin (only one
cell thick). They are thin enough to be
permeable and allow diffusion to take place.
They allow for the exchange of materials with
tissues

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