The document summarizes the human circulatory system. It explains that blood carries oxygen and nutrients throughout the body via blood vessels in a process called circulation. The heart pumps blood through three main types of blood vessels - arteries, veins, and capillaries. The lungs take in oxygen which passes into the blood and is circulated by the heart to nourish the entire body.

1. BLOOD CIRCULATION.

2. BLOOD
• Blood is a very important liquid.
• It carries oxygen and the subtances from
digestion to different parts of our body.
• The journey of our blood around the body
is called circulation.

3. • The circuculatory system is responsible for
blood circulation. It is made up of the heart
and the blood vessels.

4. THE HEART
• The heart is an organ.
• It pumps the blood around our body.
• Our heart is between the two lungs.

5. BLOOD VESSELS
• BLOOD CIRCULATES AROUND OUR
BODY INSIDE VESSELS.
• THREE TYPES OF BLOOD VESSEELS:
ARTERIES, VEINS AND CAPILLARIES.

6. - Arteries carry blood with oxygen.
- Veins collect blood with carbon dioxide.
- Capillaries connect veins and arteries.

7. BREATHING
• The respiratory system is made up of the
following organs: nostrils, trachea , two
bronchial tubes and two lungs.
• The ribs protect our lungs.

8. • Air enters our body through the nose and
mouth.
• It passes through the nostrils.
• It goes down through the trachea, the
bronchial tubes, and into the lungs.

9. • Oxygen from the air passes through the
walls of our lungs into our blood.
• We make two movements: inhalation and
exhalation.

10. • When we inhale , our lungs fill with air.
• When we exhale , the air leaves our lungs.