i am amazing!
TRANSCRIPT
GENES AND ENVIRONMENT
You inherit your Genes from your parents
Genes are made up of sections of DNA
The environment can also influence your genes
WHAT IS PLASMA?
Plasma is the liquid part of the blood which
carries everything else.
Plasma is a straw-yellow coloured liquid
If everything in plasma was removed, plasma
would look like this
WHAT DO THE DIFFERENT PARTS OF BLOOD
LOOK LIKE UNDER A MICROSCOPE?
Red
blood
cells
White
blood
cells
WHAT IS THE JOB OF RED BLOOD CELLS?
They have a round, flat disc shape for a large surface area
They do not have a nucleus
They contain haemoglobin which combines with oxygen in areas of high concentration to form oxyhaemoglobin
Oxygen + haemoglobin oxyhaemoglobin
Red blood cells carry oxygen to the cells of the body for use in respiration
HAEMOGLOBIN
gives red blood cells their colour
can carry up to 4 molecules of O2
associates and dissociates with O2
contains iron
WHAT DO PLATELETS DO?
Platelets are fragments of cells
The job of platelets is to help blood clot and form a scab
The platelets are involved in the formation of fibrin, which is needed for clotting blood
This is useful for stopping bleeding, and for preventing germs from entering the body through the cut
WHAT DO WHITE BLOOD CELLS DO?
White blood cells
help the body to
fight invading
bacteria
White blood cells
will engulf and
ingest invading
bacteria
OTHER IMPORTANT JOBS OF THE WHITE
BLOOD CELLS:
They produce
antibodies which can
recognise and fight
bacteria
They produce
antitoxins which
neutralise the toxins
(poisons) that bacteria
produce, which make
us feel ill
BLOOD TYPE
Not everyone has the
same blood type!
Blood type refers to
features of the person’s
red blood cells.
There are hundreds of
these different
features.
BLOOD TYPE
The ABO blood groups
are the features most
people know about.
In this group, there are
4 different types of red
blood cells -- A, B, AB,
and O.
BLOOD TYPE Th Rh blood groups are
the next most familiar types.
People whose red cells have a particular feature called the “ D antigen” are Rh positive. People who lack the factor are Rh negative.
Most people are Rh positive.
WHICH BLOOD TYPE IS MOST
COMMON?
Blood Type and Rh Factor Percentage of People
A + 34%
A - 6%
B + 8%
B - 1%
AB + 3%
AB - 1%
O + 40%
O - 7%
EXPLAINING THE RESULTS
Blood Group 'A': Red blood cells have the 'A
antigen' and the plasma contains anti-B antibodies.
Blood Group 'B': Red blood cells have the 'B
antigen' and the plasma contains anti-A antibodies.
Blood Group 'AB': Red blood cells have both, A
and B-antigen, and the plasma contains neither
anti-A nor anti-B antibodies.
Blood Group 'O': Red blood cells have neither A
nor B antigen, and the plasma contains both anti-A
and anti-B antibodies.