Answer:
The correct option is b. lower esophageal sphincter
Explanation:
The esophagus is the initial part of the digestive tract and its function is the transport of the alimentary bolus from the pharynx to the stomach, through the thorax and avoid the reflux thereof. It begins and ends in two sphincter structures, the upper esophageal sphincter and the lower esophageal sphincter, which separate it from the pharynx and stomach. The lower esophageal sphincter has two functions: relax during swallowing and prevent reflux of the gastric contents into the esophagus in the postdeglutory period. After swallowing, there is a relaxation of the lower esophageal sphincter, pressure dropping to levels similar to those of the gastric fundus, which allows the bolus to enter the stomach. This relaxation lasts a few seconds and is followed by a strong contraction that prevents backflow of food.
mitochondria and the Golgi apparatus i hope that's helps
Answer:
false abiotic means non-living biotic means living.
Answer:
1. C. Animals on land are very different from those in the sea
2. B. The shrimp could move to a new feeding ground
3. C. 300 feet
4. Unsure, but if I were to guess C. There is a similar environment
5. C. role in the food chain
Explanation:
Answer:
70mins
Explanation:
i don't have one I just know