The circulatory system is also known as the cardiovascular system.It consists of…

3. The Heart1. Blood 2. Blood Vessels

The three main types of blood vessels

are arteries, veins and capillaries.

The Circulatory The Circulatory SystemSystem

Blood does the job of a non-stop courier service - it collects chemicals from one part of the body and delivers them to other parts, for use or disposal.

What is Blood made of?What is Blood made of?If blood is spun in a centrifuge it will separate into 4 parts…

What does Blood do?What does Blood do?

Plasma is a straw-coloured liquid. It is mostly water with dissolved nutrients, salts, hormones and proteins.

White blood cells help to fight

infection.

Platelets are cell fragments.

Blood spinning in a centrifuge.

Red blood cells make up about 45% of the

total volume of the blood

Blood Structure

Blood StructureA photomicrograph of a blood smear showing

the appearance of blood as seen with thelight microscope (1000 x Magnification).

A photomicrograph of a blood smear showingthe appearance of blood as seen with thelight microscope (1000 x Magnification).

White blood cells

White blood cells

PlasmaPlasma

PlateletsPlatelets Red blood cells

Red blood cells

White blood cells

White blood cells

PlasmaPlasma

PlateletsPlatelets Red blood cells

Red blood cells

PLASMA

PLASMA

This is the liquid part of blood - it is straw coloured.This is the liquid part of blood - it is straw coloured.

A. Glucose from the small intestine to the cells for use in energy production.

A. Glucose from the small intestine to the cells for use in energy production.

B. Other waste products away from cells for removal from the body, e.g. urea and heat when the body is hot.

B. Other waste products away from cells for removal from the body, e.g. urea and heat when the body is hot.

Its main role is the transport of:

Its main role is the transport of:

Function

Function

These have a nucleus (control centre) and vary in shape and size.These have a nucleus (control centre) and vary in shape and size.

White Blood CellsWhite Blood Cells

Producing antibodies which help the body attack disease.Producing antibodies which help the body attack disease.

Their main role is to protect the body from disease by:Their main role is to protect the body from disease by:

Function

Function