麻烦英文高手看一道改错题

麻烦英文高手看一道改错题
What we all know,the bigger a man's muscles are,the
stronger he is.Can it be considering then that the bigger
brain a man has,the cleverer he is?The answet is not.
There're weo aimals that have larger brains than man:
the elephant and the whale.Yet,according his size,
man's brain is larger.Man's brain is usually weighs about three
pounds or a little more,and this is about one-forty of the
weight of his all body.The whale's body,on the other
hand,is one thousand times heavier than it's brain,while
the elephant's body is about five hundred times so heavy.
第四行weo应为two,打错了，不好意思