小學娃都會喜歡的science project

找一張超過小娃身高的紙，我找了一張大牛皮紙，讓小娃平躺在這張大紙上，用馬克筆，繞著小娃的身體一圈，把身體輪廓畫下來。

 

把圖畫紙掛在牆壁上。占了大半堵牆壁，隔幾天畫一個人體器官，找一些適合小娃讀的比較淺的人體生物的書，網上很多。和小娃一起讀，讀完讓娃在牆壁上畫那個人體器官。

象這樣，我們這幾天在畫消化係統。

 

學完一個人體係統，布置一個作文題，讓娃們寫一寫關於消化係統的小作文，小娃剛剛寫

A journey of a donut

Hi. I am a piece of donut. After you chew me in your mouth, I will start a two-day journey through your digestive system.

The digestion starts with your teeth breaking me down into smaller pieces. The saliva in your mouth works to dissolve me easier and faster. Then I travel to your esophagus. It is a narrow tube that connects your throat and your stomach. The stomach is full of a kind of acid known as gastric acid. It kills the bacteria in the donut that you just ate. The stomach acid further dissolves the donut puree and allows it to be absorbed by the small intestine.

Upon entering the small intestine, the donut puree crosses a large number of bumps, known as "villi". Using the villi, the donut puree is pushed through smoothly, and nutritional elements are transported from the donut puree to the blood.

The liver adds bile and the pancreas adds enzymes. Released into your small intestine, they work together in the donut puree to dissolve the fat. Carrying nutrition, the blood flows from the small intestine to your liver, where poison and waste are filtered out. Your whole body receives nutrition from clean blood.

Your body is pretty smart to tell when you need nutrition. "Glucagon" is a hormone made by your pancreas that tells the liver to release more sugar into the blood. On the other hand, if you ate too many donuts, insulin is a hormone produced by your pancreas that instructs your liver to stop releasing sugar into your bloodstream. The sugar will be stored in your liver for future use.

The leftover donut marches to your large intestine and then releases out of your body. Sadly, I have become a waste. My journey is complete.

 

 

還可以在吃飯的時候，和娃們一起進行趣味競猜，比如血從小腸出來流到哪個器官？ 哪個器官可以分泌酶幫助消化等等。胰島素是做什麽用的？

 

人體生物比化學物理直觀，適合小娃先學。小孩子對自己的身體有種天然的好奇心。了解自己的身體是怎麽運作的，本身就是一個感興趣的話題。

 

人體生物還可以結合健康話題一起來討論，比如為什麽不喝酒，酒精從消化道進入血液，血液流到肝髒，酒精在肝裏麵分解。產生有毒的乙醛，傷害肝細胞，長期喝酒會造成肝髒中毒而硬化。還有畫完腎髒，可以講一講腎髒的功能，為什麽要保護自己的腎髒，drug 從腎髒filter, 毒品直接損害腎髒細胞， drug overdose 造成kidney failure，是死因的一種。

 

帶娃去超市看一看健康的豬肝髒和豬腎髒，都是新鮮柔軟的，喝酒和吸毒就是把健康的肝髒和腎髒泡在有毒物質中，讓器官的細胞蛋白質變性，看看肝硬化的照片，對喝酒傷肝會有觸目驚心的印象。我覺得引導娃學會珍惜自己的身體是人生最重要的第一課。