Advertisements
Advertisements
Question
Veins have valves at intervals in their inner lining whereas the arteries do not have valves. Explain.
Advertisements
Solution
In arteries blood flows with pressure but in veins the pressure falls considerably and the back flow of blood is prevented by the semilunar valves.
APPEARS IN
RELATED QUESTIONS
Which organ acts as a pump in the circulatory system?
What is meant by human circulatory system?
What is Diapedesis?
What is diastole?
Name the organ from which oxygenated blood goes into the heart
Complete the following sentence with appropriate word:
The foundations of physiology were laid by the physician __________.
Blood is produced in the bone marrow.
From the following identify the normal haemoglobin count in adult male.
Name these:
Three components of circulatory system.
Given diagram is a schematic representation of the circulatory system in humans. Study the same and answer the questions that follow:
 |
- Label the parts 1 and 4 indicated in the diagram.
- Which of the above mentioned number is the thickest artery? Also write its name.
- Mention the number and chamber of the heart which has the thickest muscular wall.
- Which of the above numbers/structures has the maximum number of blood capillaries?
- Draw neat and labelled diagrams of the transverse section of vena cava and the part numbered as 3. Make sure to show the structural differences between these two in the diagram.
