bombane

8/6/2019 bombane

http://slidepdf.com/reader/full/bombane 1/4

Blood

Blood is an interesting part of the body.

y Blood constitutes about 7% of a persons weight.

y Inside the body a woman has on average 5 liters of blood.

y Man has on average 6½ liters of blood.

Blood flows everywhere through the human body.

Blood Function

Blood has three important functions : Transport, Defense & Regulation

The heart pumps blood to all our body cells, supplying them with oxygen and

food.

Blood also carries proteins and cell fragments called platelets that let blood clot

where there has been an injury.

Transport of Substance Defense Regulation

y Oxygen from lungs

y Carbon dioxide to lungs

y Nutrients from the

intestine to the liver

y Heat (regulation of

temperature)

y Waste products from

matter to liver and

kidneys

y Hormones

y Blood loss

y Microbes

y Toxins

y ph

y Temperature

y Hydration of Cells

8/6/2019 bombane


Blood Parts

Blood consists of four different parts:

Red Blood Cell

Red blood cells are also known as RBCs ,

red blood corpuscles (an archaic term) ,

haematids or erythrocyte

These cells carry oxygen.

White blood cells (

WBC

s), or leukocytes(also spelled "leucocytes"),

are cells of the immune system

defending the body against both

infectious disease and foreign materials

There are five types of white blood cells.

P

latelets

Platelets are essential fragments of cells

in the blood stream that help to form

clots, so bleeding does not occur

continuously.

8/6/2019 bombane


Plasma

Plasma is the liquid in which blood cells

and nutrients travel through the blood

stream. It's a golden yellow colored.There is about 2 - 3 liters of plasma in

the average adult human body. Plasma

also contains important proteins

Blood Type (Blood Group )

Not everyone has the same blood type! Blood type refers to features of the persons red blood cells. A

blood type (also called a blood group) is a classification of blood based on the presence or absence of

inherited antigenic substances on the surface of red blood cells (RBCs).

These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood

group system.

Blood Group System

The two main blood group systems in transfusion practice are the ABO system and the Rh(D) type.

y About half of us are blood group O

y The next most common is blood group A.

y Few people have type B, and even fewer have type AB.

8/6/2019 bombane


ABO system

Within the ABO system, people can be one of four groups - O, A, B or AB, while in the Rh(D) system they

can be either Rh(D) positive or Rh(D) negative.

People whose red cells have a particular feature called the D antigen are Rh positive. People who lack

the factor are Rh negative.

Blood Donor Chart

Documents

bombane