Answer:
D
Explanation:
Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell thick
Answer:
Basically, observation can be defined as the action or process of observing something or someone carefully or in order to gain information, in other words, watching or analyzing something so as to know more about it. For example, if a biologist wants to observe the behaviour of a specific kind of animal in the wild, that person will have to watch and focus on what that animal usually do, what it usually eats, how it hunts or find food, etc, in order to know more about the animal itself.
Answer:
In anatomical directional terminology, the esophagus is <u>posterior</u> to the mouth (option d).
Explanation:
The esophagus is a tubular organ that is part of the digestive system and its function is to carry food from the mouth to the stomach. The anatomical relationship of the proximal end of the esophagus, with respect to the mouth, is posterior and inferior, its distal end also being located above the stomach.
This anatomical relationship allows the direction of food movement to be mouth → esophagus → stomach.
It becomes D. Groundwater
