editor
228
edits
Changes
→Slide 25: Spinal Cord (Thionin)
=== Microscopic Study: Architecture ===
==== Slide 25: Spinal Cord (ThioninH&E) ====On slide 25, Spinal Cord (ThioninH&E) find under low power the cell bodies of multipolar neurons located in the two anterior horns of the gray matter (if the slide is held towards the light, the gray matter appears H-shaped). With medium power, identify a cell body containing a large pale nucleus and a darkly stained nucleolus. Study this cell under high power. The irregular, granular-like, basophilic staining masses within the cytoplasm are called Nissl bodies. They consist of free ribosomes and granular endoplasmic reticulum.
<peir-vm>UAB-Histology-00025</peir-vm>
The number of mitotic figures in a tissue is an index of the rate of turnover of the component cells. In benign tumors, mitotic figures are few in numbers, whereas in malignant tumors, mitotic figures are more numerous and may include many bizarre forms. Hence, the recognition of mitotic figures is one criterion for the interpretation of various kinds of pathology of a tissue.
=== Microscopic Study: Mitosis (Iron H) ===
On slide 34, Mitosis (Iron H), are longitudinal sections of onion root tips in which cells have been fixed in various stages of mitosis. Learn to identify the characteristic arrangement of the chromatin in each state.
