Here are the answers to the questions: 1. Red Blood cells are formed in the bone marrow. 2. White Blood Cell 3. Platelet 4. Artery 5. Capillary

2. One primary function
of the blood is to
transport oxygen to
lungs, and any other
respiratory organs
to the body cells.

3. BLOOD COMPONENTS
The components of the blood consist of:
Red Blood Cells (erythrocytes).
Which carries oxygen throughout
our entire body.
White Blood Cells (leucocytes).
Which fight harmful bacteria.
Platelets (thrombocytes).
Which is for clotting and sealing
wounds.

4. Under the microscope, RBC appear as a tiny
round or slightly oval disc-shape which are
thinned out in the center. They are elastic:
therefore they can be squeezed out of shape but
they can easily go back to their normal form.
Red Blood Cells

5. RBC are formed in bone marrow.
They have a life span of about 120
days. The process of RBC distraction is
called hemolysis.

6. RBC circulates throughout our
entire body feeding supplying and
even defending the cells or tissues that
make up our body.
RBC contains more than 200 million
molecules of hemoglobin, a protein
pigment and efficient oxygen carrier.
A hemoglobin carrying a full load of
oxygen is called oxyhemoglobin.

7. A young RBC has a nucleus like any
other cell. As it matures, its nucleus
disappears. Although mature RBC do
not contain a nucleus, they are still
considered as living cells, because they
contains enzymes that enable to
metabolized glucose.
RBC is not red in reality, it is a clear
pale yellow liquid almost like water.

8. White Blood Cells
WBC help to protect the body from
diseases.
It serve to protect the body against
infection, for example when a boil develops
on the neck the granulocytes move swiftly
into the area collecting around the bacteria
and destroying them.
They are much larger than RBC, but they
are far fewer in number
(approximately 1:600)

9. About 2/3 of white blood cells are phagocytes
which defend the body by eating up invading
germs that may have inter the body, while other
WBC called lymphocytes, knock outs the germs
by producing a disease-fighting chemicals called
antibodies. There are two types of phagocytes the
neutrophil and the monocyte.

10. Platelets
Help to stop the cuts from bleeding and
quickly form a clot that plugs the wound
which then becomes a scab and seals up the
injury and damaged vessels.
Platelets have a very active
metabolism, they are also important in
blood clotting. When a blood vessel is cut
they adhere to the rough surfaces and
release substances that help from blood
clot.

11. Platelets is the smallest blood cell and
named for their plate like shape, and like
red cells they have no nucleus
, however, they contain a few granules
which are collected mostly on the central
part of the cell.
They have a life span of about 9 days.

12. BLOOD VESSELS
There are three main parts of
Blood Vessel:
Arteries
Veins
Capillaries

14. Arteries
•carry blood away from the
heart and it
has a thick muscular walls
to cope with high
pressure

15. Arteries are found deeper within our body.
They have the same elastic, thick layers of wall
that make them resistant to injury. However if
an artery is cut, blood is pumped out through the
opening every time the heart beats. If not
stopped out through the opening every time the
heart beats, if not stopped immediately, a person
may bleed to death in a few
minutes.
Arteries become smaller and form the
arterioles. As these arterioles become smaller
and penetrate our body tissues, the narrow
down further become capillaries.

16. Veins
•carry blood back to the heart
and it has a thinner muscular
walls and contains one valve to
direct the blood back to the
heart.

17. Veins carry non-oxygenated blood to
the heart.
Blood move slower in veins because
our blood is under very low pressure.
Valves in the veins allow the blood to
flow in one direction towards the
heart, if the blood starts to go
backward, the valve closes.

18. They are so thin that a hair strand is
even wider than ten of them is placed
side by side. That is why only a single
RBC can pass through the capillaries.
The word capillary is derived from
Latin word capillus means “hair”.
Capillaries
they are tiny blood vessels that
connect arteries with veins.

19. Blood circulates in the system that
blood is pumped around the body by
the heart. When the heart squeezes
blood is pushed out under high
pressure into the arteries.
As the blood circulates around the
body it gradually losses its pressure
and flow more slowly through the
veins.
Blood Circulations

22. Questions:
1. Where does the Red Blood cells are formed?
2. It is a blood cell that protects our body from
diseases.
3. It is known as the smallest blood cell.
4. What do you call to a blood vessel that carry
blood away from the heart?
5. It is a tiny blood vessel that connects artery
with veins