A person has a head, neck, chest, two arms and two legs.  人体由头部、颈部、胸部,两条胳膊和两条腿构成。

　　Also, a human body consists of fat, muscle and bones. 同时,人体还包括脂肪,肌肉和骨骼。

　　Do you know how many bones there are in your body?  你知道人体有多少块骨骼吗？

　　There are about 200 bones in a human body. 人体大约有两百块骨骼。

　　These bones protect our organs, such as the heart and lungs. 这些骨骼保护着心肺等器官。

　　We need to have a good diet to have a healthy body.  我们要有良好的饮食习惯，从而拥有健康的身体。