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.
<span>This is not true.
Carb loading is done the week before the high-endurance activity (marathon for
example). A carbohydrate loading diet is diet with high carbohydrates . The carbohydrates are the body’s main energy
source. The goal is increasing the amount
of fuel stored in you muscles in order to improve athletic performance and endurance.</span>