Explain the role of platelets in the clotting of blood.
Assertion: Platelets play an important role in blood clotting. Reason: In the blood oozing from an injury, the platelets disintegrate and release thromboplasm that initiates clotting.
The first event in blood clotting is
…….... cells help in blood clotting.
Assertion. Blood does not clot as a leech is sucking it. Reason. An anticoagulant hirudin from the salivary glands checks blood clotting.
