(B)The human body is made up mainly of bones, muscles, and fat. Some 639 differentmuscles account for about 45 percent of the body weight.Each of these muscles has fourdistinct and measurable qualities which are of interest to us.1. It can produce force which can be measured as the str...
You probably know many things that you can do with the hundreds of different muscles in your body.But have you ever thought about how the muscles in an animal's body are different from yours?An animal's muscles are made to do the things that are most important for its life. Lions are...
1. Identify the Types of Muscles: - There are three main types of muscles in the human body: - Skeletal Muscle: These muscles are under voluntary control and are attached to bones. They help in movement and are striated in appearance. Examples include the biceps and triceps. - Smooth Mus...
Well the reason for all of those things is cells, the building blocks of life. Lesson Quiz Course 5.8K views Skin Cells There are around 35 billion skin cells covering your body. Skins cells come together to form a protective layer that surrounds your body to protect your muscles...
Youprobablyknowmanyofthethingsthatyoucandowiththehundredsofdifferentmuscles(肌肉)inyourbody.Buthaveyoueverthoughtabouthowthemusclesinananimal’sbodyaredifferentfromyours?Ananimal’smusclesaremadetodothethingsthataremostimportantforitslife.Lionsarehunters.Theydependontheirabilitytocatchotheranimals.Lionsmustbefast...
Snakes can't move themselves forward without their muscles. 蛇没有肌肉不能向前活动;D. Muscles in an animal's body are different from a human's. 动物身体的肌肉与人类的肌肉不同。根据第四段最后一句An elephant can use its nose to pick up a tree by its roots or even to lift a baby ...
【题目】Physical fitness refers to the efficient functioning of the different human body parts including the muscles, blood vessels, lungs and heart. It is also known as the ability of the human body to complete various tasks and to engage in different sports activities without experiencing health...
Muscles in the body wall, intestinal wall, and contractile hemolymphatic vessels (pseudohearts) of an oligochaete anelid ( Eisenia foetida ) were studied by electron microscopy. The muscle cells in all locations, except for the outer layer of the pseudohearts, are variants of obliquely striated ...
1. How are the doors of old houses according to the passage? They are usually much than those today. 2. Why will the human body keep changing in the future? Because we have more technology that is changing . 3. What will our muscles be like in the future? They will not be now bec...
B. Your brain grows as quickly as the other parts of your body. C. The longer your thigh bone is, the stronger you are D. You need more muscles to smile than to frown. 相关知识点: 试题来源: 解析 答案见上1.由文章第三节可知,好的教养是我们可以从父母身上学到的最重要的东西,故选...