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प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow:
- Which parts of heart are in the diastolic phase? Give a reason to support your answer.
- Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
- What causes the heart sounds ‘LUBB’ and ‘DUP’?
- Name the blood vessels that supply oxygenated blood to the heart muscles.
- Draw neat labelled diagrams of a cross section of an artery and a vein.
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उत्तर
- Ventricles are in the 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.
- 1: Pulmonary artery
2: Pulmonary veins - Closing of the bicuspid and tricuspid valves causes the ‘LUBB’ sound, and the closing of semilunar valves causes the ‘DUP’ sound.
- Coronary arteries supply oxygenated blood to the heart muscles.
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संबंधित प्रश्न
Mention the exact location of the Pulmonary semilunar valve
Given below is certain structure, write the term for the functional activity.
Erythrocytes and …………………………………
Given below is a certain structure, write its chief functional activity.
Bone marrow - ______.
Fill in the blanks with suitable words given below:
The oxygen-rich blood is pumped into different parts of the body through ______.
Multiple choice questions. Tick ( ✓ ) the correct choice:
Human heart has
Fill in the blank:
______ carry pure blood.
Draw the structure of human heart and label its parts
Given below is the simplified pathway of the circulatory system:
(i) Name the blood vessels marked 1 to 8.
(ii) Name the chamber of the heart which:
(a) Receives blood from ‘1’.
(b) Pumps blood into blood vessel ‘8’.
(iii) Mention two structural differences between blood vessels ‘7’ and ‘2’.
Complete the following sentence with appropriate word:
Beside food, oxygen and waste materials, circulatory system transports ________ to various parts of the body.
The process of keeping the blood flowing continuously throughout the body.
