True. And this is due to the fact that NASA only shows the world what the male workers do. And the males are the ones that go and do the most important jobs in NASA, shading away the female workers in NASA.
Answer:
The muscularis externa layer
Explanation:
The muscularis externa layer has three layers of muscle. An innner oblique layer , a middle circular and an external longitudinal layer. The contraction of these muscle layers help to break up the food mechanically.
A is the answer I've had this question before also on a health work sheet
