So here we have an example problem that says the gland at the right releases product. Use evidence from the image to determine if the structure is an endocrine or an exocrine gland. And so, option A says endocrine, and option B says exocrine. Taking a look at this image on the right of the gland, notice that the glandular epithelial tissue is folding in in this format that you see here. The connecting cells that are folding in have not been lost; they are retained through the development of this gland.
They are actually forming these ducts that you can see highlighted in these regions. Recall that multicellular exocrine glands use ducts like these, but endocrine glands do not use ducts. Additionally, the glandular epithelial tissue is secreting the product, these little blue circles, into the ducts. Then, the secreted product can exit onto either a body surface or into a body cavity. Recall that the secreted product exiting onto a body surface or into a body cavity is a sign of exocrine glands.
Think of the "EX" in exocrine as for the secretions exiting. Recall that endocrine glands, on the other hand, have their secretions entering the blood, and we don't really see these secretions entering into anything that seems like it's entering the blood. It looks like it's being exiting onto a body surface or a body cavity. Thus, everything that we're seeing here is aligning with answer option B, exocrine gland. So, we can go ahead and indicate that option B here is the correct answer to this example problem.
And that concludes this example, so I'll see you all in our next video.