The body's circulatory system ，includs the heart and blood vessels 身体的循环系统包括心脏和血管
The heart pumps blood to all parts of the body through a network of arteries and veins 心脏通过动脉静脉的网络工作未身体全部供血
The digestive system breaks down and absorbs food into the body 消化系统分解吸收食物到身体里
it's supplies the energy that the body needs for growth and repair它提供身体生长和修复所必须的能量
After digestion excess food is turned into waste and eliminated from the body 消化过剩的食物变成废物从身体里排出
The nervous system includes the brain spinal cord and nerves 神经系统包括大脑脊髓和神经
This is your body's control system这是你的身体的控制系统
It controls muscels and organs，including circulatory and digestive systems它控制肌肉和器官 包括循环和消化系统
The respiratory system includes the nose and lungs呼吸系统包括鼻子和肺
It brings air and oxygen into the body and removes carbon dioxide 它带进空气和氧气进入身体，排出二氧化碳
The lungs are where oxygen enters the bloodstream，and carbon dioxide is removed肺部的氧气进入血液，二氧化碳被移除
The immune system protects the body against infections and diseases 免疫系统保护身体免受感染和疾病
Sneezing and fever are examples of how the immune system works 打喷嚏和发烧事免疫系统如何工作的例子
If an infection invades the body，the immune system attacks it 如果感染侵入身体免疫系统攻击它
The blood vessels that carry oxygen-rich blood from the heart are called arteries携带心脏富氧血液的血管叫做动脉
The digestive system is where food broken down and absorbed into the body消化系统将食物分解吸收进入身体
The nervous system regulates your heartbeat and digestion 神经系统调节你的心跳和消化
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