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.
Answer:
You must be taking an test. Anyways the interesting thing about the heart it is the size of an adult fist.
The answer to your question is "False"