Name: How Your Muscles Work
Uploaded: 2019-03-18T08:11:16.000Z
Duration: 5 min 49 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

What's that over there leaning on that tree?

Someone left a plank of wood against this tree.

Oh, Wally, how fantastic it is to see you.

Oh, Wally, you must be exhausted from your travels

I can only assume you want to rest, and what's that?

If you look to your left, you'll see an ear floating

You're holding Wally with your skeletal muscles, which are

when you want to for walking, running, swimming--

Smiling, tying your shoes, focusing your eyes,

writing your name, or waving to a friend.

Nurb, instead of me caring around your super heavy friend,

why don't we stay here, and you can tell me more about muscles.

Wally, a person has more than 600 muscles

in all shapes and sizes, and they all have different jobs.

because skeletal muscles give your body power and strength.

Skeletal muscles are attached to one end of a bone and stretch

two bones meet, and attach to the bone on the other side.

They work in pairs called flexors and extensors.

In your arm, the bicep muscle is a flexor

and contracts to bend your arm at the elbow, which is a joint.

The tricep muscle is an extensor and contracts

Your other types of muscles are your cardiac and smooth

muscles, which are both involuntary muscles.

and smooth muscle is found in your stomach, intestines,

Subtitles ListPlay Video

How Your Muscles Work

assume

stretch

plenty

strength