Advertisements
Advertisements
Question
The walls of ventricles are much thicker than atria. Explain.
Advertisements
Solution
The role of the ventricles is to pump blood to all organs, causing them to exert increased pressure. The atria get blood, thus their walls are thinner since they have fewer loads to carry.
APPEARS IN
RELATED QUESTIONS
Write the differences between open and closed system of circulation
Describe the evolutionary change in the pattern of heart among the vertebrates.
Sino-atrial node is called the pacemaker of our heart. Why?
What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?
Conversion of ammonia into uric acid occurs through --------------
A patient’s chart reveals that he has a cardiac output of 7500 mL per minute and a stroke volume of 50 mL. What is his pulse rate (in beats/min)
At any given time there is more blood in the venous system than that of the arterial system. Which of the following features of the veins allows this?
Right ventricular wall is thinner than the left ventricular wall. Why?
Select the correct biological term.
The substances which gives red cells their colour.
Which among the followings is correct during each cardiac cycle?
The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is ______.
Define the following terms and give their location?
Purkinje fibre
Write the features that distinguish between the two.
Open and Closed circulatory system
Write the features that distinguish between the two.
Sino-atrial node and Atrio-ventricular node
Cardiac activities of the heart are regulated by ______.
- Nodal tissue
- A special neural centre in the medulla oblongata
- Adrenal medullary hormones
- Adrenal cortical hormones
Choose the correct answer from the options given below:
Following are the stages of pathway for conduction of an action potential through the heart:
- AV bundle
- Purkinje fibres
- AV node
- Bundle branches
- SA node
Choose the correct sequence of pathway from the options given below:
