Class 5 Science Human Body The Circulatory System Worksheet
Class 5 Science
Chapter – 1
Human Body The Circulatory System
Fill in the Blanks
- The heart is divided into __________ chambers.
- The upper chambers of the heart are called __________.
- The red blood cells contain a red pigment called __________.
- __________ blood cells help to fight against infections.
- Platelets help in __________ of blood.
- Arteries always carry blood __________ from the heart.
- Veins have __________ to prevent backflow of blood.
- Regular __________ keeps the heart muscles strong.
Give Reasons
- Why does the left side of the heart have thicker walls than the right side?
- Why are arteries deep-seated inside our body?
- Why is exercise necessary for a healthy heart?
- Why is smoking harmful for the circulatory system?
- Why are platelets important for survival?
Short Answer Questions
- Name the three types of blood cells and write one function of each.
- How does regular exercise improve blood circulation?
Long Answer Questions
- Explain the structure and working of the human heart.
- Differentiate between arteries, veins and capillaries.
- What are the harmful effects of lack of exercise on the heart? Explain with examples.
Competency Based Questions
- Ravi eats junk food daily and avoids physical activity. What problems may he face in the future?
- A person feels tired easily and often suffers from infections. Which blood cells might be affected?
- During sports day, Meena fainted due to loss of blood from an injury. Which component of blood helps to stop bleeding and how?
Case Study Based Questions
Case Study -1: Rohit is an 11-year-old boy. He spends most of his time watching TV and eating chips. He rarely plays outside. Recently, his doctor said he might develop obesity-related problems if he continues this lifestyle.
Q1. Which type of disease is Rohit at risk of developing?
(a) Communicable (b) Lifestyle
(c) Infectious (d) Genetic
Q2. Which organ will be most affected if Rohit does not exercise?
(a) Kidney (b) Lungs (c) Heart (d) Stomach
Q3. Which of the following habits should Rohit adopt?
(a) More junk food (b) More physical activity
(c) No outdoor games (d) More TV watching
Case Study 2: Rani got injured while playing and started bleeding. Her bleeding stopped after some time due to the action of blood components.
Q1. Which component of blood helped in stopping the bleeding?
(a) RBC (b) WBC (c) Platelets (d) Plasma
Q2. What is the main function of red blood cells?
(a) Carry oxygen (b) Fight infection
(c) Form clots (d) None of these
Q3. Which blood cells protect the body against diseases?
(a) RBC (b) WBC (c) Platelets (d) Plasma
Analytical Questions
- X carries oxygen to body parts, Y fights infections. Identify X and Y.
- X has thick muscular walls, Y has valves. Identify X and Y.
