Class 9C

Which blood vessel has a valve?

• Artery

• Capillaries

• Vein

• All of above

The nearest organ to which the heart supplies oxygenated blood is ______ .

• lungs

• stomach

• intestine

• heart itself

When doctor is recording your pulse, he is pressing on your wrist, exactly on the

• vein

• nerve

• artery

• capillary

The main function of lymph nodes is to

• produce leucocytes

• produce enzymes

• digest old erythrocytes

• destroy disease causing germs

Which statement is not true?

• Veins contains valves

• All veins carry deoxygenated blood

• Veins are thin walled

• Veins return blood from various parts of the body to the heart.

The valve present between the RA and RV is

• Tricuspid valve

• bicuspid valve

• aortic semilunar valve

• pulmonary semilunar valve

Which component of the blood can be best compared to the soldiers of the country

• lungs

• capillaries

• red blood cells

• white blood cells

Due to the presence of _____ back flow of blood is prevented

Red blood cells finally get digested in

• liver

• bone marrow

• spleen

• heart

During hypothermia

• blood vessels dilate

• blood vessel constrict

• both the above options

• none of above