Food is ground by teeth, tongue and saliva into tiny pieces., Swallowed pieces of food go through a small passage., Pieces of food become smaller, Nutrients from the food are absored, Undigested food becomes faeces and stored temporarily.

さんの投稿です

リーダーボード

表示スタイル

オプション

テンプレートを切り替える

自動保存: を復元しますか?