手是 hand（s），腳是 foot（feet），這是英語入門者就能學會和記住的詞。但是再細分一下呢？
手臂透過肩膀和軀幹相連；手肘和手腕都是關節，可以彎曲；手臂的末端是手，手包含手掌和 5 根手指頭；腿透過臀部和軀幹相連，我們用腿站立；腿可再細分為大腿、膝蓋、小腿、腳踝、腳掌、腳趾頭。
How to teach kids about the human body? Maybe a video can be an easier way for kids to learn about the human body.
In today’s video, we will talk about limbs. There will be an introduction about arms, elbows, wrists, hands, fingers, nails, legs, thighs, knees, ankles, feet, and toes.
Arms are connected to the trunk by your shoulders. The elbow is a joint, so you can bend your arm. The wrist is another joint. At the end of your arms, you can find your hands. On your hand, you have the palm, a thumb and four fingers. You can touch with your hands.
Lower limbs are your two legs. You use your legs to stand on. Your legs are connected to your trunk by your hips. The top parts of your legs are your thighs. Below thighs, you can find the joints, knees. With knees, you can bend your legs. Your ankle is another joint where your foot joins your leg.
At the end of your legs, you can find your feet. You use your feet to walk. At then end of each foot, you can find your five toes.
At the end of your fingers and toes, you can find the thin hard parts called nails.
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