More Histology Picture Cards

Question 1

What is circled in yellow? What is the thing with the red asterisk?

Answer 1

Yellow thing is an osteon, red asterisk is a central canal aka haversian canal.

Question 2

What cells are seen at the tips of the yellow arrows? Where do they originate from?

Answer 2

Osteoclasts - lymphoid origin.

Question 3

What type of ossification is happening here? What are the cells in zone 2 doing?

Answer 3

Endochondral ossification. Zone 2 chondrocytes are dividing (proliferative zone).

Question 4

This is a peripheral nerve. What kind of cell is at the tip of the arrow?

Answer 4

Schwann cell

Question 5

1. The area labeled “CC” has some darkly-staining nuclei. What cells contain these nuclei? What do these cells produce?
2. What types of cell bodies would you find in the white matter?

Answer 5

1. Ependymal cells make CSF
2. Cell bodies of glial cells, astrocytes, oligodendrocytes, and endothelial cells are in the white matter.
   - note that both gray and white matter are vascularized