Done By :zhen Teck, Ernest, Brina, Amira

BLOOD AND BLOOD VESSELS

BLOOD VESSELS

• What are blood vessels?

• Ans : Blood vessels are intricate networks of hollow tubes that transport blood throughout the entire body

• Why do we need blood vessels?

• Diffusion is too slow to transport materials and cannot remove wastes

BLOOD VESSELS IN THE BODY

• Arteries

• Veins

• capillary

ARTERIES

• Is an elastic blood vessel that transport blood away from the heart

• Question: What is the function of Arteries?

• It is to carry blood away from the blood. It is equipped with thick walls, smooth muscles and very elasticized tissue

VEIN

• Is an elastic blood vessel that transport blood all over the body

• What is the Function?

• It is to carry blood towards the Heart.

CAPILLARY

• Extremely small blood vessel located within the tissue of the body.

• Function: pick up waste, carbon dioxide, nutrients and gas

TYPES OF CELLS

• Red blood cell

• Plasma

• White blood cell

• platelets

EXAMPLES OF RED BLOOD CELLS

RED BLOOD CELLS

• Transport oxygen from the lungs to other parts of the body

• Oxygen is produced during respiration

WHITE BLOOD CELLS

• Defends the body against both infectious disease and foreign materials.

• They live about 3 to 4 days in the human body.

EXAMPLES OF WHITE BLOOD CELLS

PLASMA

• holds the blood cells in whole blood in suspension

• protects the body from infection and other blood disorders.

• pale-yellow liquid

EXAMPLES OF PLASMA

PLATELETS

• small, irregularly shaped clear cell fragments

• do not have a nucleus

• lifespan of a platelet is normally just 5 to 9 days

• Stops bleeding

EXAMPLES OF PLATELETS

CREDITS

• Done by: Ernest ,Brina, amira, zhen teck