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1
What is the organ(s) that pump(s) blood throughout the human body?
Lungs
Heart
Kidneys
Blood vessels and capillaries
2
If number of platelets _____________ in our blood it could lead to excess of bleeding that could be fatal for us.
Decreases
Increases
Equal
None of these .
3
The main function of the heart is to pump __________________ and keep it moving in the blood vessels.
Blood
Lymph
Plasma
4
Platelet cells are present in our _________________ and they circulate all around the body through it.
Artery
Vein
5
__________________ are thin walled blood vessels and form a network of extremely tiny blood vessels between arteries and veins.
RBC cells
WBS cells
Capillaries
6
How many chambers does the heart have _________________ .
Six
Four
Five
7
The vessels that carry blood away from the heart are called __________________ .
Arteries
Veins
8
There are about ________________________ platelets per microlitre of blood.
15,0000-40,000
1,50000-4,0000
150,000-400,000
9
______________________ carry carbon dioxide-rich blood back to heart from other parts of the body.
10
Four chambered heart is characteristic feature of :
Fishes
Amphibians
Reptiles
Mammals
11
Which type of blood vessels carries blood away from the heart?
ALL of these
12
Red
Blue
Orange
White
13
How many chambers are present in the human heart?
One
Two
Three
14
Which of the following are correct ?
(a) The platelet cells have granules but no nucleus. They live for 5-9 days.
(b) There are about 160,000-600,000 platelets per microlitre of blood.
(c) If number of platelets decreases in our blood it could lead to excess of bleeding that could be fatal for us.
Only (a) and (b) is correct .
Only (b) and (c) is correct .
Only (a) and (c) is correct .
All of these .
15
(a) Platelet cells are present in our blood and they circulate all around the body through it.
(b) There is bleeding these platelets act as a plug to stop it.
(c) The clot, which forms at the point of wound, is a microscopic network of insoluble fibrous protein.