Question

APR photo McGraw-Hill Education Which structure is highlighted and indicated by the leader line?

Answer 1

By using the context clues present in the image, we can conclude that the highlighted structures correspond with what we expect to observe when viewing merocrine sweat glands.

When viewing histological images, it is important to rely on context clues to properly identify the structures being viewed.

In the attached image we can observe:

• Various layers
• Glands
• Keratin
• Excretion ducts
• Adipose tissue

Using information previously obtained we can conclude that the organ being viewed is skin, given that it is the only organ with all of the characteristics being viewed;

1. A thick keratin layer on top
2. Three layers of varying tissues types which correspond with the epidermis, dermis, and hypodermis
3. Merocrine glands which represent the sweat glands present in skin tissue
4. Merocrine excretion ducts

Once we have established the organ we are viewing and are aware of all the structures that may be present when viewing a sample of this organ, we can analyze which structure is being highlighted. In this case the highlighted structure is that of Merocrine sweat glands, which we can infer from their shape, color, and the excretion ducts originating from them.

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