To answer your question: the nucleus has a membrane.
<span>The brain has a finite capacity to process a certain number of tasks in a given amount of time. As we see reaction time decreases with increase in the number of tasks that the brain is doing simultaneously. It seems that the brain tries to do both activities together however it increases the processing time for each activity.</span>
Peristalsis is what moves the food in the digestive system
An organ I believe that is the correct answer
