Advertisements
Advertisements
प्रश्न
Answer in only one sentence of the following question:
Mention the role of the pacemaker in human heart.
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.
APPEARS IN
संबंधित प्रश्न
Explain with the help of a suitable diagram conducting system of human heart.
Choose the correct answer:
Which of the following engulfs pathogen rapidly?
Given alongside is a diagram of the external features of the heart.
(i) Name the parts ‘1’ to ‘7’.
(ii) What happens if the coronary artery gets an internal clot?
(iii) Which type of blood does part ‘5’ carry?
(iv) Mention one structural difference between part ‘5’ and ‘4’.
Name an instrument which is used to hear heart sounds.
Complete the following sentence with appropriate word:
The heart is made up of special muscles, the _______ muscles.
Draw diagram of conducting system of human heart. Label SA node and bundle of His.
______ is the nodal tissue located in the lower-left corner of the right atrium.
Complete the analogy.
The contraction of heart muscles: Systole:: Relaxation of heart muscles: ______.
The inner surface of the ventricle is thrown into series of irregular muscular ridges called ______
Heart is covered with double-walled membrane called ______.
