Port Said International Schools
Worksheet: 4
grade: 5
Better Education for Future Generations
Date:
Science Department
Name:…………………………….
---------------------------------------------------------------------------------------------------------------------------------
1- Complete the following sentences:
1. Heart is located within the chest cavity between the lungs
2. Heart beats cause pumping blood to all body parts.
3. Heart is consisted of 4 champers filled with blood and connected with blood vessels
4. Blood flows inside a network of pipelines called blood capillaries
5. The blood vessels that emerge from the heart are called arteries
6. white blood cells attack the microbes that cause diseases to human.
7. red blood cells carry oxygen and carbon dioxide inside the body.
8. blood keeps body temperature constant.
9. Blood platelets form clot which help in healing wounds.
10. Blood is transported from all parts of the body by vein to the heart.
.
2- Give reason:
a. The two sides of heart are separated.
To prevent mixing the blood
b. Heart contains valves.
To allow the blood to pass from atrium to ventricle and prevent it returning back.
c. Blood flows in one direction only inside the heart.
Due to the presence of the valve .
d..Blood capillaries have a thin wall.
To allow blood to deliver food and oxygen to the cell and then carry carbon dioxide and waste
31.
2.
3.
4.
5.
6.
7.

Write the scientific term which expresses each of the following sentences:
A muscular organ, about the fist in size and located within the chest.( heart
The two lower champers of the heart.
(
ventricle
The network of pipelines that extend all over the human body.
( blood capillaries
The blood vessels that collect blood from all body parts and pour it into heart.
(
veins
The cells that have no nuclei.
( red blood cell
The small bodies that play a role in blood coagulation when the body is wounded.
(
platelets
A yellow watery fluid in which blood cells float.
(
plasma
)
)
)
)
)
)
)
Port Said International Schools
Worksheet: 4
grade: 5
Better Education for Future Generations
Date:
Science Department
Name:…………………………….
---------------------------------------------------------------------------------------------------------------------------------
5- Complete the following sentences by using the following words:
( plasma – valve – veins – left ventricle – clot – blood platelets )
1. Vessels that carry blood to the heart are called veins
2. There is a valve between atrium and ventricle on each side of the heart.
3. when the left atrium contracts, it pushes the blood to the left ventricle
4. Blood consists of red blood cells and white blood cells, blood platelets and plasma
5. When the blood is exposed to the air, a bloody clot is formed.

7- Choose the correct answer:
1- The heart is a muscular pump in a size of your ………………
- Finger.
- Foot.
- Fist.
2- Blood vessels which carry blood from the heart are the ……………..
- Arteries.
- veins.
-blood capillaries.
3- Blood components which are responsible for attacking the microbes causing diseases to
man are the …………………….
- red blood corpuscles - white blood corpuscles
- blood platelets