Advertisements
Advertisements
प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow :
(i) Which parts of heart are in the diastolic phase? Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
(iii) What causes the heart sounds ‘LUBB’ and ‘DUP’?
(iv) Name the blood vessels that supply oxygenated blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section of an artery and a vein.
Advertisements
उत्तर
(i) Ventricles are in diastolic phase. The arrows indicate blood entering the ventricles. During a ventricular diastole, the valves between atria and ventricles open which allow the entry of blood into the ventricles.
(ii) 1 – Pulmonary artery, 2 – Pulmonary veins
(iii) Closing of the bicuspid and tricuspid valves causes the ‘LUBB’ sound, and the closing of semilunar valves causes the ‘DUP’ sound.
(iv) Coronary artery supplies oxygenated blood to the heart muscles.
(v) Cross-section of an artery and a vein:
APPEARS IN
संबंधित प्रश्न
Name the following:
The smallest common blood vessels formed by the union of capillaries.
Production of RBCs occurs in ______.
Multiple choice questions. Tick ( ✓ ) the correct choice:
The blood vessels in which blood goes away from the heart to different body parts are
Long answer question:
Describe human blood and give its functions.
Use your brain power!
How is the air that we inhale purified in our body?
_____ gas is transported to all parts of the body.
Which of the following is/are required for the production of RBCs?
Reduction in number of ______ can cause clotting disorder, leading to excessive loss of blood from the body.
______ refers to a marked decrease in the number of platelets.
Which component of the haemoglobin molecule combines with the oxygen molecule to form oxyhaemoglobin?
