Each component has a certain function, and it is structured in a special way to suit for the function, all the components rely on each other and cooperate with each other to fufill the task of the machine. --> split into multiple sentences ?
Consumption of the fuel has to provide power or engergy to the machine. --> Consumption of the fuel has to provides with power or engergy to the machine. Or --> Consumption of the fuel is needed to provide power or engergy to the machine. ?
animal body is composed by various parts --> is composed of ?
digestive tract which digest and absorb food; emunctory which get rid of the waste; --> digestive tract which digests and absorbs food; emunctory which gets rid of the waste; ?
