Помогите пожалуйста!

Вставьте артикль там, где необходимо.



… main systems of … body have groups of organs working together to perform complex functions.

… mouth, esophagus, stomach, small and large intestines are organs which compose … digestive system.

There are some organs within … each system.

… circulatory system is also called … cardiovascular system.

The main function of … respiratory system is to convey … oxygen and to remove … carbon dioxide