SUBJECT: HEALTH
UNIT – 1 [ HUMAN BODY]
1. Choose the correct options for the given questions.
A. Which of the nutrients is soluble?
d. Vitamin (Note: Water-soluble vitamins or simple carbohydrates can be soluble, but vitamins are a primary classification here).
B. How many segments of the left lung are there?
c. two sections
C. In which organ is the purification of blood done?
b. Lungs
D. Deficiency of which blood cell causes anaemia?
d. Red blood cells
E. What is the smallest unit of the kidney called?
a. Nephron
F. What is the primary function of the digestive system?
c. Food digestion
G. Which organ is responsible for breaking down and digesting food in the digestive system?
c. Stomach
H. What is the name of the first organ in the digestive system where digestion begins?
c. Mouth
I. In the digestive system, where are nutrients absorbed into the bloodstream?
c. Small intestine
J. What is the primary function of the respiratory system?
c. Gas exchange
K. Which organ in the respiratory system is responsible for gas exchange?
c. Lungs
L. What is the main purpose of the heart in the circulatory system?
c. Pumping blood
M. Which blood vessels carry oxygenated blood away from the heart?
a. Arteries
N. In the circulatory system, which component of blood helps in clotting wounds?
d. Platelets
2. Briefly answer the following questions.
a. Define digestive system.
It is the system that breaks down food into nutrients.
b. What is respiratory system? Write in a sentence.
It is the organ network responsible for breathing and gas exchange.
c. How do you define circulatory system?
It is the system that transports blood throughout the body.
d. Define urinary system.
It is the system that filters waste products from blood.
e. Which two systems does Pharynx ensure the proper functioning? Name them.
Ans.
The respiratory system.
The digestive system.
f. What is the primary function of the urinary system?
To remove liquid body waste by producing urine.
g. Which organ in the urinary system is responsible for filtering blood and producing urine?
The kidneys.
h. What is the smallest functional unit of the kidney involved in urine formation?
The nephron.
3. Answer the following questions.
a. Enlist the organs that make up the digestive system.
Ans→The organs that make up the digestive system are listed below:
- Mouth
- Esophagus
- Stomach
- Small intestine
- Large intestine
- Rectum and Anus
b. What are the four major functions of digestive system?
Ans.→ The four major functions of digestive system are given below:
- Ingestion of food.
- Mechanical and chemical digestion.
- Nutrient absorption.
- Elimination of solid waste.
c.
d. Explain the concept of the circulatory system.
Ans.→The circulatory system serves as the body’s internal delivery network. The heart acts as a central pump. It pushes blood through blood vessels. This blood delivers oxygen and nutrients to every cell. It also collects waste products to be cleared away.
e. What are the functions of circulatory system? Write any four.
Ans.→ The functions of circulatory system are as follows:
- Transporting oxygen to cells.
- Delivering nutrients from food.
- Removing metabolic waste products.
- Fighting diseases using white blood cells.
f. Write the reasons why the circulatory system is considered the most vital system in the human body.
Ans.→It connects all other organ systems together. Without it, oxygen and nutrients cannot reach cells. Wastes would also build up quickly. Cells would die within minutes without its continuous service. Therefore, the circulatory system is considered the most vital system in the human body.
g. Outline the functions of the kidneys and structural location.
Ans.→The function of the kidneys and structural location are outlined below:
- Functions: Filters blood toxins, balances body fluids, and maintains blood pressure.
- Location/Structure: Two bean-shaped organs. Located against the back muscles of the upper abdominal cavity.
h. Write short notes on:
Ans.→
