19 Mighty Muscles

Mighty Muscles written by Samantha Montgomerie

萨曼莎·蒙哥马利写的《强壮的肌肉》

what are muscles? Trapezius Deltoid Pectoralis major Serratus anterior Biceps Linea alba External abdominal oblique Rectus abdominus Tendinous inscription The human body has more than 600 different muscles. All of these muscles make up the body's muscular system. These muscles help us to do many things. We use our muscles every time we move. Sometimes we think about moving our muscles. We do this when we use them to lift heavy things. Some muscles also work without us having to think about them. They can help to pump our blood. Our heart is a muscle that works to pump blood around the body.

什么是肌肉?斜方肌三角肌胸大肌锯肌前二头肌白线腹外斜腹直肌腱肌铭文人体有600多种不同的肌肉。 所有这些肌肉组成了身体的肌肉系统。 这些肌肉帮助我们做很多事情。 我们每次运动都要用到肌肉。 有时我们想要运动肌肉。 当我们用它们举起重物时，我们就会这样做。 有些肌肉在我们不需要思考的情况下也会工作。 它们可以帮助输送血液。 我们的心脏是一种肌肉，它的作用是将血液输送到全身。

how muscles work Skeletal muscle Cardiac muscle Smooth muscle Muscles have thin cells that are in bundles. Our brains or bodies tell them when they have to move. They contract or relax, pulling our bones. They can also work in pairs to move parts of the body. One muscle will contract and the other will relax. There are three different types of muscles in the human body. Skeletal Muscles, Smooth Muscles and Cardiac Muscles. These all do different jobs.

肌肉是如何工作的骨骼肌心肌平滑肌肌肉有成束的薄细胞。 我们的大脑或身体会告诉他们什么时候该动。 它们收缩或放松，拉动我们的骨头。 他们还可以结对活动身体的某些部位。 一块肌肉收缩，另一块肌肉放松。 人体有三种不同类型的肌肉。 骨骼肌，平滑肌和心肌。 它们都有不同的作用。

skeletal muscles Skeletal muscles cover our bones and move our skeletom These are the muscles that show how strong we are. These muscles give our body power. They help us to be quick and able to lift heavy things. We can control what we want these muscles to do. These are called voluntary muscles. If we want to kick a ball, we are able to make our leg do this. If we want to lift our backpack, we can make our arm do this.

骨骼肌覆盖我们的骨骼并移动我们的骨骼，这些肌肉表明我们有多强壮。 这些肌肉给予我们身体力量。 它们帮助我们变得敏捷，能够举起重物。 我们可以控制我们想要这些肌肉做什么。 这些被称为随意肌。 如果我们想踢球，我们可以让我们的腿这样做。 如果我们想举起我们的背包，我们可以让我们的手臂这样做。

smooth muscles Smooth muscles work the organs in our bodies. These work on their own and are called involuntary muscles. Our brain tells these muscles what to do without us even thinking about it. Smooth muscles help to push food through our body. They help our eyes to focus and make the hair on our bodies stand up when we are cold.

平滑肌使我们体内的器官活动。 这些肌肉自己工作，被称为不随意肌。 我们的大脑告诉这些肌肉该做什么，我们甚至都没有想过。 平滑肌帮助推动食物通过我们的身体。 它们帮助我们的眼睛聚焦，让我们身上的毛发在冷的时候竖起来。

cardiac muscles Muscle Tissue Heart Cardiac Muscle Muscle cells The cardiac muscle is the muscle that makes up the heart. Like a smooth muscle, it works without us thinking about it. It works hard to keep our heart beating quickly. It beats 60 to 100 times a minute. The cardiac muscles work like a pump. They contract to pump and push blood through the heart. They pump blood into the rest of the body then relax to let the blood back into the heart.

心肌肌肉组织心肌肌肉细胞心肌是构成心脏的肌肉。 就像平滑肌一样，我们不需要思考它就能工作。 它努力保持我们的心脏快速跳动。 它每分钟跳动60到100次。 心肌就像泵一样工作。 它们收缩以泵送血液通过心脏。 它们将血液泵入身体的其他部位，然后放松，让血液回流到心脏。