SCIENCE - BIOLOGY

Blood & Blood Vessels

Done by: Nitra, Shi Lee and Matthew

About blood…

DEFINITION

Blood is a specialised bodily fluid that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.

Substances FOUND IN BLOOD…

1) PLASMA

It is the yellowish fluid in blood that makes up the 55% of the total blood volume. It consists of dissolved proteins, glucose, clotting factors, mineral ions, hormones, CO2. In the body, plasma serves as a medium to transport essential substances in blood.

2) RED BLOOD CELL

The red blood cell specialised for oxygen transport, having high concentrations of haemoglobin in the cytoplasm.

3) WHITE BLOOD CELL

It is the primary rule involves the body’s immune system, protecting the body against invading micro-organisms and foreign particles.

4) PLATELETS

It is a particle found in the bloodstream that binds to fibrinogen at the site of a wound to begin the blood clotting process.

About blood vessels…

DEFINITION

The blood vessels are the part of the circulatory system that transports blood throughout the body.

3 major parts of the blood vessels…

1) ARTERIES

Arteries are blood vessels that carry blood away from the heart. This blood is normally oxygenated, exceptions made for the pulmonary arteries.

2) CAPILLARIES

Capillaries are the smallest of a body's blood vessels. It enables the actual exchange of water and chemicals between the blood and the tissues.

3) VEINS

In the circulatory system, veins are blood vessels that carry blood towards the heart.

THE END~!