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B2
Circulatory system
Blood vessels
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Created by
Joanna S
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Cards (7)
Vein ➡️
into
the
heart
,
deoxygenated blood
Artery ➡️
away
from the
heart
,
oxygenated oxygen
Types of blood vessels:
Artery
Vein
Capillary
Arteries
layers of
muscle
in the walls makes them
strong
elastic
fibres
allow them to stretch
this helps the artery withstand the
high pressure
created by the heart
Veins
lumen is
wide
to allow the
low
pressure blood to flow through
have
valves
to ensure the blood flows in the
right
direction
Capillaries
one cell thick walls
, for
short
diffusion
path
permeable
walls, so
substance
can
move
across
Blood vessels
A)
Lumen
B)
Elastic fibers and smooth muscle
C)
Artery
D)
Vein
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