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Name blood vessel X.
Pulmonary artery
Three types of blood vessels are
Artery, vein and capillary
Artery carry blood ________ heart
away from
Which blood vessel (W, X, Y and Z) carries
blood from lungs?
Y
What is X?
X
Blood cells
State two differences between A
and B
The wall of A is thinner than B.
The lumen of A is larger than B.
Name blood vessel W.
aorta
What is A?
A
B
C
Red blood cells
Name valves X.
Semilunar valve
What is the function of C?
A
B
C
Cell C engulfs germs that enter the body
and digest them by phagocytosis.
Red blood cells
Made in
Red bone marrow
Name chamber C.
Left atrium
Which blood vessels (W, X, Y and Z) are veins?
Y and Z
Which blood vessels (W, X, Y and Z) carry
oxygenated blood?
W and Y
What is the function of B?
A
B
C
Cell B produces antibodies to kill germs or
neutralize toxins released by the germs.
Explain why blood pressure changes
periodically in aorta.
The heart contracts and relax
periodically.
Old red blood cell will broken
down in
Liver
The circulatory system includes
Blood
Blood vessels
Heart
Explain two ways how blood cell A
is structurally adapted to its function.
A
B
C
It does not contain nucleus so it has more space
to carry more haemoglobin.
It is biconcave disc shape so it has a large surface
area to volume ratio. Oxygen can diffuse rapidly
across the cell membrane.
Name blood vessel Z.
Vena cava
Main substance in plasma is
water
Name artery A. What is its function?
Artery A is coronary artery.
It supplies oxygen and nutrient to
the cardiac muscles.
A DNA moleculeconsists of 2
polynucleotide chains. The
chains run in opposite directions
and twist to form a
Double helix
Name valves X.
Semilunar valve
Compare the thickness of the wall of
right and left ventricles. What is the
significance of the difference?
Left ventricle has thicker wall than right
ventricle.
Left ventricle can provide greater force to
pump blood to all parts of the body except
lungs whereas right ventricle pumps blood
only for a short distance to the lungs.
Name chamber D.
Left ventricle
Name blood vessel Y.
Pulmonary vein
Name Q.
Septum
Vein carry blood ________ heart
towards
What is the function of septum?
Septum prevents the mixing of
oxygenated blood and
deoxygenated blood.
Name chamber B.
Right ventricle
What is B?
A
B
C
Lymphocyte
The _______ of capillary is one
cell thick.
wall
Blood pressure in venae cavae is
very low. Explain how a continuous
blood flow is maintained.
• Valves in the venae cavae prevent
backflow of blood.
• When the muscles lying next to the
veins contract, they press against the
veins. The veins are squeezed so
blood flows forwards.
What is the function of valves in
vein?
Prevent the backflow of blood
Blood platelet can help in
Blood clotting to stop bleeding
and prevent entry of germs
Identify blood vessel A and B
A is vein
B is artery
Explain why the capillary wall is
only one-cell thick.
It provides a short distance for rapid
exchange of materials between the blood
and the body cells by diffusion.
Which blood vessels (W, X, Y and Z) are
arteries
W and X
The red pigment in red blood cell
is
haemoglobin
What is the shape of A?
A
B
C
Biconcave disc shape
Blood platelet
Made in
Red bone marrow
What is the function of A?
A
B
C
Carry oxygen throughout the
whole body
Name chamber A.
Right atrium
What is Z?
Z
Plasma
Which of the following cannot
found in plasma?
a.
b.
c.
d.
Water
Glucose
Starch
Protein
What is C?
A
B
C
Phagocyte
Identify blood vessels P, R and T?
P: artery, R: capillary, T: vein
Name valves Y.
Tricuspid valve
Name chamber B.
Bicuspid valve
White blood cells
Made in
Red bone marrow
Explain why blood pressure is very low in
venae cavae.
The blood has overcome great friction of
the blood vessel walls after travelling a
long distance.
Waste(e.g.
and
) diffuse from the
body cells to blood.
Carbon dioxide, urea
What is A and B?
A
small
lumen
B
thick
wall
Cross section
Longitudinal section
A is elastic tissue, B is muscle
Useful substances (e.g.
and
diffuse from the blood to the body cells.
Glucose, amino acids
)
Explain why the carpillaries are
highly branched to form a
network..
It provides a large surface area for rapid
exchange of materials between the
blood and the body cellsby diffusion.