If my textbooks are correct, the answer would be the law of superposition, but you might wanna double check that! Hope this helps you out!
Answer:
d. mucosa, submucosa, muscularis, serosa
Explanation:
The layers of the digestive tract starting from the lumen are mucosa, submucosa, muscularis and serosa.
- The first layer is mucosa which is made of epithelium cells and helps in absorption of nutrients from digested food. It has numerous villi structure which increase the surface area for absorption.
- Second layer submucosa supports mucosa and is supplied with large blood vessels, nerves and lymphatics. Absorbed nutrients enter the blood vessels which are present in submucosa.
- The third layer muscularis functions to create peristaltic movements in GI tract. Muscles in this layer make the food move and mix with digestive juices.
- Final layer serosa works to reduce friction between digestive tract muscles. It has a thin cell layer which secretes serous fluid that acts as a lubricant.
cephalocaudal principle
The cephalocaudal principle states that development proceeds from top to bottom. According to this principle, a child will gain physical control of their head first. After this, physical control will move downward to the arms and lastly to the legs.
Answer:
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Answer: c is the answer
Explanation: it the answer because spud waves travel without the air u hear it