BLOOD AND BLOOD VESSELS

Done By: Nigel , Sheng xi , Ching Er

RED BLOOD CELLS

Red blood cells are the most common type of blood cells which take up oxygen in the

lungs.They lack of a cell nucleus

The cytoplasm is rich in haemoglobin(an iron-

containing biomolecule)that can bind oxygen and is

responsible for the blood's red colour

WHITE BLOOD CELLS

White blood cells(leukocytes) are of the immune system involved in defending the body against both infectious disease and foreign materials. They live for about three to four days in the average human body.

PLATELETS Platelets are small, irregularly shaped

clear cell fragments (cells that do not have a nucleus containing DNA)

The average lifespan of a platelet is normally just 5 to 9 days.

If the number of platelets is too low, excessive bleeding can occur.

However, if the number of platelets is too high, blood clots can form thrombosis(the formation of a blood inside a blood vessel), which may obstruct blood vessels and result in such events as a stroke.

PLASMA Plasma is the straw-colored or pale-yellow liquid

component of blood normally holds the blood cells in whole blood in

suspension. It makes up about 55% of total blood volume. It is mostly water (93% by volume) and contains

dissolved proteins(Major proteins are fibrinogens, globulins and albumins)

BLOOD VESSELS(MAIN) There are three major types of blood

vessels: 1) arteries 2)Capillaries 3)veins

ARTERIES Artery are blood vessels that carry blood

away from the heart. This blood is normally oxygenated,

exceptions made for the pulmonary and umbilical arteries

CAPILLARIES

Capillaries are the smallest of a body's blood vessels

Capillaries do not function on their own

VEINS In the circulatory system, veins (from

the Latin vena) are blood vessels that carry blood towards the heart.

Most veins carry deoxygenated blood from the tissues back to the heart.

THANK YOU Sources: Google.com,

Wikipedia.com