10. Explain the mechanism of gaseous exchange between tissues and blood.
11. Why does blood not clot inside healthy vessels? What happens if the blood clots inside an
intact vessel?
Answers
Answer: 10. The mechanism of oxygen flow between blood and tissues is given below: Blood carries oxygenated blood from lungs to other parts of the body. ... Now due to the difference in the oxygen concentration between blood and tissues, oxygen diffuses from blood into the tissues and carbon dioxide from tissues into blood.
11. A substance called fibrinogen is present in blood... when there is a cut, this fibrinogen converts into fibrin. Fibrin and platelets are together responsible for clotting.... if a clot is formed in a blood vessel..it can lead to many effects... if the vessel was near brain then clot is fatal... if clot is near heart then high chances of heart attack... clot mainly blocks the blood to flow...so where ever the vessel is. it will prevent flow...
Answer:
Gaseous exchange in humans occurs through diffusion. In lungs, oxygen from alveolar air diffuses into blood vessels surrounding the capillaries and carbon dioxide from blood is given out into lungs. This oxygen is carried to the tissues and it diffuses from the blood vessels into the tissues.
Explanation:
Blood doesn't clot in the blood vessels because of a chemical called heparin.
Explanation:
Heparin is an anticoagulant which does not allow the blood to clot in the blood vessels