CIRCULATORY SYSTEM

Blood is made up of _________,_________ blood cells, ________ blood cells and cell fragments called ________.

• Plasma/red/white/platelets

• arteries/veins/capillaries/atria

_______ is a yellowish liquid which is 90% water. It carries the nutrients and waste products.

• Plasma

• Platelets

• Arteries

• Veins

_______ blood cells give blood its colour. They carry oxygen and carbon dioxide.

• Red

• White

• Platelets

_______ blood cells fight infection. They surround and absorb germs which enter the body.

• White

• Platelets

• Red

When the body is losing blood because of a cut in the skin, ________ join together and help stop the bleeding.

• platelets

• white cells

• red cells

Blood is transported through three types of blood vessels: ________, _______ and _____.

• arteries/veins/capillaries

• plasma/red/white

_______ carry blood from the heart to the rest of the body. This blood contains oxygen.

• Arteries

• Veins

• Capillaries

_______ carry the blood back to the heart. This blood contains carbon dioxide.

• Veins

• Arteries

• Capillaries

______ are tiny blood vessels which connect the arteries and the veins. They have very thin walls so gases and nutrients can easily pass through them to the cells.

• Capillaries

• Veins

• Arteries

The _______ is a hollow muscle which pumps blood through the body. It usually beats between 60 and 100 times per minute, but can go much faster when it has to. When we do exercise, our bodies need more ______, so our _____ beats faster.

• heart/oxygen/heart

• arteries/veins/capillaries

• oxigen/heart/oxigen