Studying for the Winter Exam

The Blood

Functions of the blood
1) Transport
2) Fight disease
3) Repair blood vessels
4) Distribute oxygen

Composition of the blood:
Whole blood is made up of liquid and solids.
1) 55% liquid (plasma)
2) 45% solid

1) Plasma:
- a straw-coloured liquid
- composed of water and dissolved substances

Function of plasma:
- gives fluidity to the blood
- transports dissolved nutrients and waste
- contains disease-fighting antibodies
- transports the body's CO2

2) Solids
- cells
- there are three types of blood cells

i) red corpuscules (red blood cells)
ii) white corpuscules (white blood cells)
iii) platelets

LYMPH
Lymph is a fluid that bathes the cells of the body. It is derived from the fluid that leaves the capillaries.

Lymph fills the spaces between the blood vessels and the body cells where the exchange of oxygen and nutrients takes place.

THE HEART

Check out this link to learn more in-depth details about the heart, and see diagrams

A muscle that is shaped like a pear and about as big as a fist. It is located to the left of the middle of the chest, and acts as a pump.

Structure of the heart:A basic diagram of the heart, with labels (click on this)

- left and right side
- these are separated by a wall
- each side pumps blood separately

The heart is divided into four chambers
- the top two are called atriums
- the bottom two are called ventricles

The vena cava brings blood into the heart from the body.

The aorta sends blood to the body from the heart.

BLOOD CIRCULATION


2 circulatory systems
1) Pulmonary circulation
2) Systematic circualtion

3 kinds of blood vessels:
1) arteries
2) veins
3) capillaries


For more information on the circulatory system - how blood moves around the body, click the link below:
http://users.tpg.com.au/users/amcgann/body/circulatory.html

***** MORE NOTES TO COME***** ALSO STUDY BLOOD GROUPS!*****

TUTORIALS FRIDAY AT LUNCH AND AFTER SCHOOL