Share Science 4 - Unit 1.3 - Skeletons and movement
Save to Folder
What do muscles do? 肌肉做什么？
They pull on your bones to make them move. 它们拉动你的骨头使其移动。
What are muscles? 什么是肌肉？
The soft parts inside your body that pull on your bones. 你体内柔软的、拉动骨头的部分。
What happens when a muscle contracts? 当肌肉收缩时会发生什么？
It gets shorter and tighter. 它变短变紧。
What happens when a muscle relaxes? 当肌肉放松时会发生什么？
It gets longer and looser. 它变长变松。
True or False: Muscles are hard like bones. 对还是错：肌肉像骨头一样坚硬。
False. 错。
Fill in the blank: When a muscle ______, it gets shorter and tighter. 填空：当肌肉______时，它会变短变紧。
Contracts. 收缩。
Fill in the blank: When a muscle ______, it gets longer and looser. 填空：当肌肉______时，它会变长变松。
Relaxes. 放松。
How do muscles work? 肌肉如何工作？
They work in pairs. 它们成对工作。
True or False: Muscles work alone and do not need bones. 对还是错：肌肉单独工作，不需要骨头。
False. 错。
When you bend your arm, what happens to the muscle on the top of your arm? 当你弯曲手臂时，手臂上方的肌肉会发生什么？
It contracts and gets shorter. 它收缩并变短。
When you bend your arm, what happens to the muscle on the bottom of your arm? 当你弯曲手臂时，手臂下方的肌肉会发生什么？
It relaxes and gets longer. 它放松并变长。
When you straighten your arm, what happens to the muscle on the bottom of your arm? 当你伸直手臂时，手臂下方的肌肉会发生什么？
It contracts and gets shorter. 它收缩并变短。
What does "contract" mean? "收缩"是什么意思？
To get shorter and tighter. 变短变紧。
What does "relax" mean? "放松"是什么意思？
To get longer and looser. 变长变松。
Why do we need both bones and muscles to move? 为什么我们需要骨头和肌肉一起才能活动？
Muscles pull on bones to make them move. 肌肉拉动骨头使其移动。
What am I? I am a soft part inside your body that pulls on your bones. 我是什么？我是你体内柔软的、拉动骨头的部分。
A muscle. 肌肉。
