Olympiad Test Level 1: Human Body Class 3 Science MCQs & solutions - Free

The organ that helps us in the sense of feeling is the Skin. So, the correct answer is B: Skin.

The central nervous system has two parts:

1. Brain: Helps us think and control our body.
2. Spinal Cord: Sends messages between the brain and the body.

So, the correct answer is Brain and Spinal Cord.

The system that forms the framework for our body is the Skeletal System. So, the correct answer is B: Skeletal System.
The skeletal system includes all of the bones, cartilages, and ligaments in the body that provide support and give shape to the body.

The digestive system removes solid wastes such as faeces from the body through the large intestine.

The Rectum is not part of the urinary system. So, the correct answer is D: Rectum.
The rectum is part of the digestive system, it stores feces before they are expelled from the body. 

The system that receives messages from the sense organs and sends orders to different parts of the body is the Nervous System. So, the correct answer is C: Nervous System. 

There are 206 bones in the adult human body.
These bones work together to form the skeleton, which gives our body shape, helps us stand, and protects important organs like the heart and brain.

Correct Answer is - Circulatory System.
The Circulatory System is like a delivery system in our body. It moves blood, which carries oxygen and nutrients, to all the parts of the body. This blood is pumped by the heart and travels through tubes called blood vessels. It also helps take away waste that our body doesn't need.

The correct answer is B: Oesophagus or Food Pipe.
The oesophagus is a long tube that helps carry food from the mouth to the stomach. After you chew and swallow food, it moves down this tube to the stomach where it gets digested.

The respiratory system is responsible for taking in oxygen and removing carbon dioxide. This process is known as respiration.

The correct answer is B: Respiratory System.

This flow Diagram shows how we breathe. First, air enters through our nose, then goes down the windpipe (trachea), and finally reaches our lungs.
This process is part of the respiratory system, which helps us breathe and get oxygen into our bodies.

The correct answer is C: Muscles.
About 40% of our body weight comes from muscles. Muscles help us move and do different activities like walking, running, and lifting things.
They are an important part of our body.

The correct answer is C: The heart pumps blood into tubes called Nerves.
This statement is incorrect because the heart pumps blood into tubes called blood vessels, not nerves.
Nerves are part of the nervous system and are responsible for sending signals, while blood vessels carry blood throughout the body.

The main function of the skeletal system is to give shape and support the body.
It protects internal organs and helps in movement of the body. Gaseous exchange is the function of Lungs.

The correct answer is D: A woman making and baking cookies.
In this situation, a woman can use her sense of smell to smell the cookies, her sense of taste to check if they taste good, her sense of touch to feel the dough and the temperature of the oven, and her sense of sight to see the cookies while baking. All these senses can be used at the same time.

The ear is the body part that helps us hear sounds, like people talking, music, or birds singing. It does not help us see, touch, or smell.
So, the correct answer is A: Hearing.

The Nervous System controls all our activities of seeing, hearing, learning, thinking, and feeling. So, the correct answer is B: Nervous System. The nervous system is a complex network of nerves and cells that transmit signals between different parts of the body.