Answer:
its the nervous system and the endocrine system 
Explanation:
the nervous and the endocrine are the bodys main regulators
 
        
             
        
        
        
Answer:
Regions of the digestive system can be divided into two main parts: the alimentary tract and accessory organs.
the alimentary tract and accessory organs.
Explanation:
<em><u>hope </u></em><em><u>it </u></em><em><u>helps </u></em><em><u>^</u></em><em><u>^</u></em>
 
        
             
        
        
        
The process that is responsible for causing menstruation is called menstrual cycle. Menstrual cycle is the natural change that occurs specifically in the ovaries and uterus or in the female reproductive system that gives possibility to pregnancy. This process is required for the ovocytes to be produced, and also for the uterus to be prepared for pregnancy. 
        
                    
             
        
        
        
The emu is the bird that lives on the south coast of australia