__________________ are thin walled blood vessels and form a network of extremely tiny blood vessels between arteries and veins.

______________________ carry carbon dioxide-rich blood back to heart from other parts of the body.

  There are about ________________________ platelets per microlitre of blood.

The vessels that carry blood away from the heart are called __________________ .

How many chambers does the heart have _________________ .

Platelet cells are present in our _________________ and they circulate all around the body through it.

Arteries are ____________ in colour.

The pure, oxygenated blood, rich in nutrients are carried by the ___________________

Which type of blood vessels carries blood away from the heart?

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.