2. • 55% Plasma
• 45% 99% red blood cells
1% white blood cells and platelets
Phagocytes Lymphocytes
3. Phagocytes are very important
components of our body's immunity
(innate immunity). They are cells that can
phagocytose foreign microbes (engulfing
microbes by the cell membrane) and then
they use enzymes to break down these
foreign microbes. Phagocytes may also
present the remnants of the microbe to a
different type of cells (lymphocytes) to
create a memory of that microbe in the
body.
4. To fight off infections creating antibodies which
are microscopic proteins which are shaped
specially to fit one pathogen
Example ...
There is a different antibody for the flu and a
different one a cold (however there would be
many for the common cold as it mutates very
quickly -Look up mutation) .
There are many types of lymphocytes
5. The function of the platelets is to
clot blood. Therefore, it stops
blood from flowing if a body part
is cut. They also interfere in the
maintainance of
homeostasis.(process which
causes the bleeding to stop.)
6. Plasma is the liquid part of blood and
carries dissolved substances such as
glucose and other products of digestion,
hormones, vitamins, urea and carbon
dioxide and transports them to all the
organs and tissues in the body.
The plasma makes the blood a liquid, the
cells in the blood are suspended in the
plasma. Thus when you cut yourself the
blood comes out as a liquid.
7. -The function of red blood cells is to carry
oxygen from the lungs to the heart and around
the body.
-When oxygen combines with haemoglobin,
the blood is oxygenated. Oxygen is delivered
to all the cells of the body for respiration.
-Deoxygenated blood carries carbon dioxide,
the waste product of respiration, from the
cells to the heart.
