Histology Flashcards
What is a fasicle?
group of fibres
How many fasicles do muscles contain?
several
Where is the epimysium found?
around a muscle
Where are perimysiums found?
around a fasicle
Where are endomysiums found?
around single muscle fibres
Why are skeletal muscles striated?
all of the adjacent myofibrils are held in registry with each other so the z lines match up
What matures to form chondrocytes?
chondroblasts
Where are chondrocytes found?
in the lacuna in the extracellular matrix
What colour is hyaline cartilage?
blue white and translucent
What colour is eastic cartilage?
yellow and flexible
What colour is fibrocartilage?
white
What is ECM in cartilage made up of?
75% water
25% organic material - type 2 collagen and proteoglycan aggregates
What is the difference between cancellous and trabecular bone? - both lammellar bone
cancellous bone has canals
trabecular bone had spaces adjacent to the bone
What is the diaphysis made up of? What part of bone does it make?
cortical bone
shaft of bone
What is the epiphysis made up of? What part of bone does it make?
cancellous or trabecular bone
ends of the bone
What do canals in the bone contain?
osteocytes
What is the role of osteoprogenitor cells?
serve as a pool of reserve osteocytes
found on bone surfaces
What is the role of osteoblasts?
bone forming cells on the surface of developing bone
What is the role of osteoclasts?
responsible for bone reabsorption
large multinucleated cells
What is the role of osteocytes?
a bone cell trapped in a bone matrix
What is osteoid? What is it secreted by? What does it become?
collagen, GAGs, proteoglycans
secreted by osteoblasts
mineralised to bone
What is the mineral of bone made up of?
calcium phosphate crystals
What type of bone is laid down during development or following a break?
woven bone
