Which of the following is NOT true about the digestive system of annelids?
a. It contains setae to move the food through the anus.
b. It is similar to an open tube.
c. It passes nutrients through the intestinal wall to the bloodstream.
d. It stores soil in the crop and grinds it up in the gizzard.
A?
A is not true.
Thank you!
To determine which statement is NOT true about the digestive system of annelids, let's examine each option:
a. It contains setae to move the food through the anus.
This statement is true. Annelids, such as earthworms, have setae, which are bristle-like structures, to help move the food through the digestive tract.
b. It is similar to an open tube.
This statement is also true. The digestive system of annelids consists of a straight tube that runs from the mouth to the anus, allowing food to pass through.
c. It passes nutrients through the intestinal wall to the bloodstream.
This statement is true as well. Annelids have a specialized tissue lining the intestinal wall, called the typhlosole, which increases the surface area for absorption of nutrients. These nutrients then pass through the intestinal wall and enter the bloodstream.
d. It stores soil in the crop and grinds it up in the gizzard.
This statement is NOT true about the digestive system of annelids. Annelids do have a crop, which stores food temporarily, but they do not store soil specifically. Additionally, while some annelids do have a gizzard that helps grind up food, this is not a universal feature among all annelids.
Therefore, the correct answer is option d. It is NOT true that the digestive system of annelids stores soil in the crop and grinds it up in the gizzard.