Circulatory System
Important Questions on Circulatory System
Differentiate between the veins and arteries.
Geeta measured the pulse rate of four students. The table below shows her findings.
| Pulse rate of the student (beats per minute) | |||
| 1st Reading | 2nd Reading | 3rd Reading | |
| Student 1 | 74 | 73 | 74 |
| Student 2 | 80 | 78 | 79 |
| Student 3 | 72 | 72 | 78 |
| Student 4 | 72 | 71 | 72 |
Why did Geeta measure the pulse rate of each student thrice?
Give one or two word answer for the following:
These are present in the blood and help the blood to clot.
Give one or two word answer for the following:
Lower organisms get oxygen directly through this process.
Write the name of the organs and the organ systems they are part of.
Differentiate between auricles and ventricles.
Give three differences between RBCs and WBCs.
Refer to the given figure of heart and select the correct option.
Explain the difference between red blood cell and white blood cell.
The following statements show the discoveries made by different scientists around the world, as people tried to understand how the circulatory system works.
• William Harvey: An English doctor. He showed how valves in veins stopped blood flowing the wrong way. He predicted the existence of tiny blood vessels, linking arteries to veins.
• Galen: A Roman doctor. He showed that arteries contained blood. He thought that blood flowed through tiny holes in the heart from the right ventricle to the left ventricle.
• Erasistratus: A Greek doctor. When he dissected bodies, he found air in arteries and concluded that arteries carried air around the body.
• Ibn-al-Nafis: An Islamic doctor, born in modern-day Syria. He showed there were no holes in the middle of the heart, and thought that blood flowed from the right side of the heart to the lungs and then back to the left side. From here it was pumped around the body.
• Marcello Malpighi: An Italian doctor. He discovered capillaries, using a microscope.
Write the statements in the order in which they happened.
Draw a table to compare the structures and functions of the three types of blood vessels.
A student feels 15 pulse beats in 10 seconds. Calculate the pulse rate.
Mention two differences between blood and lymph.
Unscramble the jumbled word LIRUSACE.
Fill in the blanks in the diagram given below to show the circulation of blood in the body.
Explain the differences between the arteries and veins.
Explain the functional correlation of circulatory system with respiratory, digestive and excretory system.
Find out my partner.
| Group 'A' | Group 'B' |
| 1. Heartbeats | a. 350 ml |
| 2. RBC | b. 7.4 |
| 3. WBC | c. 37C |
| 4. Blood donation | d. 72 |
| 5. Normal body temperature | e. 50-60 lakh/ mm3 |
| 6. pH of oxygenated blood | f. 5000-6000 per mm3 |
What would you do to sense your pulse beat?
Differentiate between white blood cells and platelets.
