Step-by-step explanation:
✩ The main jobs of digestive system are as follows :
- It breaks down the complex particles of food into simpler particles to which the body can absorb.
 - It helps to supply carbohydrates ( sucrose , lactose , maltose and glucose ) , protein ( animo acids ) , fat ( fatty acid ) and vitamins to our body.
 - It protects the body from different types of diseases likely to be caused by malnutrition.
 - It helps to separate unnecessary substance from the nutrients for ejection / egetion.
 - It helps to absorb water and mineral for the body.
 
✩ The main jobs of excretory system are as follows :
- It helps to filter out the unnecessary substances ( solid , liquid and gas ) from the body.
 - It helps to change more harmful ammonia into less harmful urea.
 - It maintains the amount of water and salt in our body.
 - It maintains body temperature by sweating in summer.
 - It also separates excess and harmful chemicals from the medicine taken in.
 
Hope I helped ! ♡
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