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REET Level 1 · EVS

The Human Body — REET EVS Notes

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This page covers the human body's major organs and systems — especially the types of teeth, the digestive system, key organs (heart, lungs, kidneys), and the five sense organs. In REET EVS, this topic tests basic, factual understanding of body structure and function.

  • 1 question in REET 2024
  • Class 1–5 level
  • 6 min read
Verified 17 September 2026 · Source: Human Teeth — Wikipedia

How this topic is asked in REET

REET 2024 asked which teeth do the job of tearing and shredding food — the correct answer was the canines. This shows that from the human body topic, REET asks direct, simple factual questions on the types of teeth, their functions, and basic body systems (digestion, respiration) — all pitched at the Class 1-5 level.

Types of Teeth and Their Functions

Type of toothFunctionNumber in an adult (out of 32)
IncisorsCutting food8
CaninesTearing and shredding food4
PremolarsHelping chew food8
MolarsChewing and grinding food12 (including the wisdom teeth)

Children first get 20 milk teeth, which gradually fall out and are replaced by 32 permanent teeth roughly between the ages of 6 and 12.

The Simple Journey of Digestion

Food begins its journey in the mouth and passes through the food pipe (oesophagus), the stomach, the small intestine and the large intestine before leaving the body. In the mouth, the teeth break food into smaller pieces and saliva softens it; in the stomach, food mixes with gastric juice; in the small intestine, nutrients are absorbed into the blood.

The liver and pancreas are digestive glands that support this process, releasing bile and pancreatic juice respectively. In Class 1-5 EVS, this whole process is taught through simple words and pictures as 'the journey of food'.

In the large intestine, water is absorbed back from the leftover undigested food, turning waste into a solid form, which eventually leaves the body through the rectum. At the junction of the small and large intestine sits a small tube-like structure called the appendix, which has no major role in human digestion, though inflammation in it needs immediate medical attention.

Major Organs of the Body and Their Functions

Heart
Pumps blood throughout the body; an adult's normal resting heart rate is around 72 beats per minute
Lungs
Perform respiration — taking in oxygen and releasing carbon dioxide
Brain
The centre for thinking, memory, and controlling all body activities
Kidneys
Filter the blood and remove the body's waste products as urine
Skeletal system
Gives the body its shape and support; an adult human body has 206 bones in total
Skin
The largest organ of the body; protects against germs and helps regulate body temperature

The Five Sense Organs

SenseOrganFunction
SightEyeIdentifying light and colour
HearingEarIdentifying sound, maintaining the body's balance
SmellNoseIdentifying scent
TasteTongueIdentifying sweet, sour, salty and bitter tastes
TouchSkinSensing hot-cold, pain and pressure

All five sense organs send information to the brain, which then controls the body's response through the nervous system.

A Simple Introduction to Respiration and Circulation

When we breathe, air passes through the nose into the lungs, where oxygen enters the blood and carbon dioxide leaves the body — this is called respiration. The heart works like a pump, sending oxygen-rich blood to every part of the body and bringing waste-carrying blood back to the lungs — this is called blood circulation.

The skeletal system (bones) and muscles together give the body shape, support and movement — bones also protect vital organs like the brain and heart. At the Class 1-5 level, these systems are taught not in depth but through simple, everyday examples (like the heart beating faster after running) of 'how the body works'.

Blood is mainly made up of four components — plasma (the liquid part), red blood cells (RBCs, which carry oxygen), white blood cells (WBCs, which fight disease), and platelets (which help blood clot). At the Class 1-5 level, children can simply be told that blood's red colour comes from the red blood cells present in it.

How to Teach This to Children

Classroom activity

Have children look at their teeth in a mirror and count and identify the incisors, canines and molars — direct observation gives the most lasting learning.

Teaching aids

Use a simple human body chart/model, or a picture showing the digestive system's journey — for Class 1-2, large, colourful, simple pictures work best.

Common misconception

Children often assume all teeth do the same job. Teachers should explain each tooth type's distinct function (cutting/tearing/chewing) with examples.

Additional teaching aid

Put up a labelled 'body chart' in the classroom that children see every day — repeated visual exposure helps things stick.

Assessment idea

Ask children, 'Which teeth work the hardest when you eat roti?' — this kind of everyday, example-based question makes for a simple assessment of understanding.

Experience-based activity

Have children feel their own heart beating fast after running or jumping, and discuss why breathing and heartbeat speed up after exercise — this gives a living, felt experience of respiration and circulation.

Body Care and Hygiene

For a healthy body, regularly brushing teeth (twice a day), eating a balanced diet, getting enough sleep, and regular exercise/play are all essential. The EVS curriculum teaches children that knowing about the body's organs is just as important as building the habits that take care of them, so healthy habits get formed from childhood itself.

Memory trick

A trick for remembering what teeth do — 'incisors cut, canines tear-shred, molars chew-grind'. To remember the count: 8 incisors + 4 canines + 8 premolars + 12 molars = 32 (an adult's total permanent teeth).

REET 2024 Questions (Solved)

Question 133

Which teeth work to tear and chop the food ?

  1. Aकृन्तक
  2. Bरदनक
  3. Cचर्वणक
  4. Dपश्च चर्वणक

Explanation

रदनक (Canine) दाँत नुकीले होते हैं और भोजन को चीरने-फाड़ने का काम करते हैं। कृन्तक (Incisor) भोजन को काटने तथा चर्वणक व अग्र-चर्वणक भोजन को चबाने-पीसने का काम करते हैं।

Practice Questions

Question 1

Which teeth mainly perform the function of cutting food?

  1. Aकृन्तक (Incisor)
  2. Bरदनक (Canine)
  3. Cचर्वणक (Molar)
  4. Dअग्रचर्वणक (Premolar)

Explanation

Incisors are the flat, sharp-edged front teeth, which do the job of cutting food.

Question 2

How many molar teeth does an adult human have in total?

  1. A4
  2. B8
  3. C12
  4. D16

Explanation

An adult human has 12 molars in total (3 on each side of the upper and lower jaw), which includes the wisdom teeth.

Question 3

In which organ are the nutrients present in food mainly absorbed into the blood?

  1. Aआमाशय
  2. Bछोटी आँत
  3. Cबड़ी आँत
  4. Dग्रासनली

Explanation

Nutrients from digested food are absorbed into the blood mainly in the small intestine.

Question 4

How many milk teeth initially erupt in children?

  1. A20
  2. B24
  3. C28
  4. D32

Explanation

Children start out with 20 milk teeth, which later fall out and are replaced by 32 permanent teeth.

Question 5

Which sense organ performs the function of recognizing taste?

  1. Aनाक
  2. Bत्वचा
  3. Cजीभ
  4. Dकान

Explanation

The tongue does the job of identifying taste (sweet, sour, salty, bitter).

Question 6

Which organ secretes bile?

  1. Aअग्न्याशय (Pancreas)
  2. Bयकृत (Liver)
  3. Cआमाशय (Stomach)
  4. Dबड़ी आँत

Explanation

The liver secretes bile, which aids in the digestion of fat.

Question 7

Which sense organ mainly helps maintain the body's balance?

  1. Aआँख
  2. Bकान
  3. Cनाक
  4. Dत्वचा

Explanation

The ear helps not just with hearing but also with maintaining the body's balance, because a special balance-related structure sits inside the inner ear.

Question 8

Which is the most suitable way to teach Class 1-2 children the types of teeth?

  1. Aकेवल वैज्ञानिक नाम रटवाना
  2. Bदर्पण में अपने दाँत देखकर प्रत्यक्ष पहचान करवाना
  3. Cजटिल आरेख (diagram) बनवाना
  4. Dटॉपिक को छोड़ देना

Explanation

For young children, direct observation — like looking at their own teeth in a mirror — gives more effective and memorable learning than abstract scientific names.

Question 9

Digestion of food in the stomach mainly occurs by mixing it with which substance?

  1. Aलार (saliva)
  2. Bजठर रस (gastric juice)
  3. Cपित्त रस (bile) केवल
  4. Dवायु

Explanation

In the stomach, food is partially digested by mixing with gastric juice; before that, saliva softens the food in the mouth.

Question 10

Which of the following is the correct order of teeth found from front to back in the jaw?

  1. Aकृन्तक → रदनक → अग्रचर्वणक → चर्वणक
  2. Bचर्वणक → रदनक → कृन्तक → अग्रचर्वणक
  3. Cरदनक → कृन्तक → चर्वणक → अग्रचर्वणक
  4. Dअग्रचर्वणक → कृन्तक → रदनक → चर्वणक

Explanation

The correct front-to-back order of teeth in the jaw is: incisors (frontmost), then canines, then premolars, and molars at the very back.

Frequently Asked Questions

How many types of teeth do humans have?+

Humans have four types of teeth — incisors (for cutting), canines (for tearing/shredding), and premolars and molars (for chewing/grinding).

How many permanent teeth does an adult human have in total?+

An adult human has 32 permanent teeth in total, while children start out with 20 milk teeth.

Which teeth do the job of tearing and shredding food?+

The canines are pointed teeth that do the job of tearing and shredding food.

How many sense organs does the human body have?+

Humans have five sense organs — the eye (sight), the ear (hearing), the nose (smell), the tongue (taste) and the skin (touch).

How many bones are there in an adult human body in total?+

An adult human body has 206 bones in total, forming the skeletal system that gives the body its shape and support.

Which organ filters the blood and removes waste from the body?+

The kidneys filter the blood and remove waste products from the body in the form of urine.

What role does the brain play in the body?+

The brain is the centre for thinking, memory, and controlling all the body's activities — movement and its responses to information received from the senses.

What causes blood's red colour?+

Blood's red colour comes from the red blood cells (RBCs) present in it; these cells carry oxygen to every part of the body.

Read Next

Diseases and Prevention

Previous EVS topic — communicable and non-communicable diseases and prevention.

Plants Around Us

Next EVS topic — types of plants and their importance.

REET Syllabus

The complete REET Level 1 and Level 2 syllabus in one place.

REET 2024 Solved Paper

All REET 2024 questions with explanations.

Official Sources

  1. Human Teeth — Wikipedia

Change Log

  • 17 September 2026 — English page published — mirrors the fact-checked Hindi page, independently bilingual-accuracy checked