Advertisements
Advertisements
प्रश्न
Answer in only one sentence of the following question:
Mention the role of the pacemaker in human heart.
एका वाक्यात उत्तर
Advertisements
उत्तर
- The Sinu-auricular (SA) node is the pacemaker of the heart.
- It generates wave of contraction which spread along the wall of atria and bring about their contraction.
- It has highest degree of rhythmicity and is the first to originate the cardiac impulses and determine the rate of heart beat.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
What is the the other name of 'high blood pressure'?
Name the main parts of the circulatory system.
Draw a sectional view of the human heart and label on it Aorta, Pulmonary arteries, Vena cava, Left ventricle.
Match the terms given in column I with terms in Column II:
| Column I | Column Il |
| (i) Left-auricle | (a) Clotting |
| (ii) Right auricle | (b) Thebasius valve |
| (iii) Left ventricle | (c) Pulmonary vein |
| (iv) Right-ventricle | (d) Aorta |
| (v) Fibrin | (e) Pulmonary arch |
Choose the correct answer:
Which chamber of the heart has the thickest wall?
When are the sounds ‘LUBB’ and ‘DUB’ produced during heartbeat ?
Why is the SA node called the pacemaker of the heart?
Complete the following sentence with appropriate word:
In man (human), the heart has _____ chambers.
Name the chambers in human heart?
A vein differs from the artery in having ______.
