INSIDE YOUR BODY ACTIVITIES

Here you have some activities to practice what we studied about the Systems in our Body.

BLOOD CIRCULATION

Blood is continuously moving inside our body.
This movement is called blood circulation: it's the process by which blood flows to distribute oxygen and nutrients to different parts of the body and carries away waste substances.
The circulatory system is formed by:

• Blood: a red liquid which transports substances throughout the body.
• Blood vessels: arteries, veins and capillaries.
• The heart: an organ made up of muscles that are working all the time. The heart is connected to the blood vessels and pumps blood through them to all parts of the body.

CIRCULATORY SYSTEM. FROM WIKIPEDIA

BLOOD VESSELS

Blood vessels are hollow tubes that are distributed throughout our body and circulate blood.
An adult's body has abot four to six litres of blood in this closed circuit.
There are three types of blood vessels:

• Arteries are thick. Arteries carry blood away from the heart to other organs.
• Veins are thick. Veins carry blood back to the heart.
• Capillaries connect veins and arteries. They are thin and fragile.

There are three types of blood vessels.