1st Period | Nutrition_ Are hamburgers really bad for you?
How does our body generate energy? ··· 12
What is our body made of? ··· 16
Should I eat a hamburger or not? ··· 20
Spiral Love's Organizing Notes... 26
Find the Science Quiz Master! ··· 27
Mr. Yong's Science Cafe... 28
- What nutrients cure scurvy and beriberi?

2nd Period | Mouth_ Why do we have to chew thoroughly for better digestion?
How small should food be cut? ··· 33
Why do teeth come in so many different shapes? ··· 36
How does saliva break down food? ··· 38
The Digestive Trio in Your Mouth... 43
Spiral Love's Organizing Notes... 46
Find the Science Quiz Master! ··· 47
Mr. Yong's Science Cafe... 48
- Dirty spit? Thank you spit!

3rd Period | Above_ Why is the stomach shaped like a pocket?
Where does swallowed food go? ··· 52
How can you eat so much? ··· 56
Why does food only go down? ··· 60
Spiral Love's Organizing Notes... 62
Find the Science Quiz Master! ··· 63

4th Period | Small Intestine_Why is the small intestine so long?
What nutrients are digested in the small intestine? 66
The identity of the hair growing in the small intestine... 71
How does the long small intestine fit inside the stomach? ··· 77
Spiral Love's Organizing Notes... 80
Find the Science Quiz Master! ··· 81

5th Period | Large Intestine_ How does the large intestine make poop?
What's Made in the Large Intestine? ··· 85
Why Farts Smell So Bad... 88
What happens if you hold in your fart? ··· 90
Spiral Love's Organizing Notes... 94
Find the Science Quiz Master! ··· 95
Mr. Yong's Science Cafe... 96
- The tunnel that passes through our body

6th Period | Excretion_Why do we urinate?
Pooping isn't excretion? ··· 100
How much urine do you produce each day? ··· 103
Excretion also occurs through the skin? ··· 106
Spiral Love's Organizing Notes... 110
Find the Science Quiz Master! ··· 111
Mr. Yong's Science Cafe... 112
- The story of excrement and urine escaping from the body

Crossword Quiz... 114
Into the Textbook... 116
Search ··· 118

[Mr. Yong's Bustling Science Class] Volume 13: Digestion and Excretion

Is there a tunnel through which food is broken down into tiny grains and rapidly absorbed into our bodies? Every day, we eat, go to the bathroom, and urinate and defecate.
But the food that looked delicious turns into dirty urine and foul-smelling feces in the bathroom.
What is going on?

In the 『Digestion and Excretion』 section, we learn about the process by which the food we eat is digested and excreted within the body.
Why do adults call a delicious hamburger a bad food? Why do people have different shaped teeth? How do mukbang creators manage to devour 100 pieces of sushi in a single sitting? What are the true nature of the countless microorganisms teeming in my stomach?

This book explains in detail the concept of nutrients that make up our bodies and provide energy, as well as how food passes through various digestive organs, is broken down into nutrients, and is absorbed into the body.
It also shows how leftover food waste and waste products are eliminated from the body.
As they witness the intense daily process of digestion within the body's mysterious tunnels, lined with various digestive organs, young readers will marvel at the intricacies of the human body and develop a greater appreciation for themselves.

If you read it with interest and enjoyment, you will soon find that scientific knowledge has entered your head!

Considering the reading level of children today, who are familiar with visual media but lack basic reading comprehension skills, the content was delivered in the easiest language possible at children's eye level.
The friendly narrative style, consisting of dialogue between characters, makes it easy for even children who are not accustomed to reading short stories.
We've also optimized the structure to make it easy to read and understand accurately by utilizing various visual aids.

Satisfy your curiosity in real life and develop your scientific thinking skills!

It provides a framework for viewing not only simple scientific concepts but also phenomena and problems through a scientific lens.
This book, which draws scientific curiosity from real-life materials and approaches concepts and principles, resonates with children and naturally draws them into the book.
Readers can not only satisfy their scientific curiosity and gain knowledge, but also develop scientific thinking and attitudes.

A colorful visual composition that catches the eye!

It delivers content intuitively through a variety of visual aids, including vivid and realistic photos, clear illustrations, and humorous characters.
Additionally, we've designed the book to reduce the burden of learning and make science an enjoyable subject by summarizing the key content of each unit through 4-panel cartoons.

A new standard for elementary science based on the latest science textbooks from 2020!

It faithfully reflects the contents of the most recently revised elementary and middle school textbooks.
Each volume, organized by topic, covers elementary school subjects as well as concepts learned in middle school, tailored to the elementary school level.
Additionally, we have further enhanced the curriculum connectivity by reflecting the scientific terminology used in the revised textbooks.

A book painstakingly developed by trusted science education experts!

This book was painstakingly created by science education experts who have long studied science at universities and taught children directly in the field, participating in the entire development process from planning to editing.
To convey accurate scientific concepts at an elementary school level, we studied elementary, middle, and high school textbooks as well as various domestic and international expert materials to develop fresh materials and explanation methods that are suitable for children's level.
Additionally, the series' reliability has been enhanced by repeatedly ensuring the accuracy of its content through review by authoritative professors who teach science at education universities.