Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
1st bones to ossify in 2nd month in utero
|
clavicle
|
|
|
|
main function
|
growth and remodeling of bones
|
|
|
|
specific function
|
1. hematopoise (production of all blood cell except most lymphocytes
2. hematoclasia-destroy damaged cells 3. immunity-supplies stem lymphocytes and monocytes 4. osseus-bone remodeling |
|
|
|
gross structure
|
red marrow-active hematopoises (found in flat bones)
yellow marrow-contains fat cells (little hematopoiesis |
|
|
|
shift from red to yellow marrow
|
neonates-all red marrow
5-7 years (fat appers in shaft of long bones) 18-alomost all long bone marrow is yellow |
|
|
|
microscopic structure
|
vascular compartment
hemopoietic compartment |
|
|
|
vascular compart
|
nutrient arteries enter via nutrient foramina, empty into sinusoids in marrow cavity, then back out the same way
|
|
|
|
predominate vascular element in marrow, have single endothelial cell layer w/ thin basement membrane, surrounded by reticular fibers and phagocytic cells
|
sinusoids
important concept? |
walls frequently crossed by cells in transit
|
|
|
hemopoietic compartment
|
b/t sinusoids, contains 1. cells of hemopoitic lineage, CT cells (mast, macrophages, plasma, reticular)
|
|
|
|
located against outer walls of sinusoids to provide access to platelet circulation
|
megakarycytes
|
|
|
|
erythrocyte location
|
early-near sinusoids
late-against walls of sinusoid |
|
|
|
granulocyte location
|
early-furthest from sinusoids
late-against walls |
|
