Histology- bone, cartilage connective tissue

adipocytes

type of connective tissue, notice small amounts of pink/red wispy fibers

collagen (one)

type of connective tissue. Note the different types of fibers and cells

dense connective tissue

type of connective tissue

notice the packed, parallel arrangement of fibers

elastic connective tissue

(Collagen stains blue and elastin stains red)

(Azan stain)

embryonic connective tissue

note pink stained fibers

Azan stain

Collagen stains blue and elastin stains red

Verhoeff stain

It intensely stains elastic fibers black and lightly stains collagen red.

dense irregular connective tissue

(perichondrium around the trachea)

(pink) type of connective tissue

chondrocytes

the cells within the “holes”

lacunae

the “holes” that contain a type of cell

articular/hyaline cartilage

the lighter purple- on the “edge” of a bone

notice the lack of a perichondrium

perichondrium

the “reddish” middle layer

notice how it has two layers

outer fibrous layer of the perichondrium

(Dense irregular connective tissue/collagen I)

the more orangey, crackly looking tissue

inner chondrogenic layer of the perichondrium

the “inner”, more stringy looking tissue.

fibrocartilage

notice the mix between dense regular CT and hyaline cartilage

osteon

circular column of bone “building block”

central canal

lamellae

layers of intracellular bone matrix

in this photo, they are arranged in rings

lacunae

darker stained “spaces” that contain a cell

canaliculi

darkly stained small channels

haversian vessels

vasculature in the center of the canal

osteoblasts

cells found on the inner surface of some canals

compact bone

the two outer edges

spongy/cancellous/trabecular bone

the “inside” part of the hemisphere

epiphyseal plate

the two purple solid layers

resting zone of the epiphyseal plate

the lighter purple section

part of endochondral ossification

non-dividing chondrocytes

proliferative zone of the epiphyseal plate

area where cells are rapidly dividing

notice the “stacks of coins”

zone of hypertrophy of the epiphyseal plate

note the cells growing larger

zone of calcification/ossification of the epiphyseal plate

the reddish-purple layer

note the change in color→ what substance is this becoming?

osteoclast

type of cell

note the large cell size and the many nuclei

some of these cells have “fuzzy” or “spiky” edges

trabeculae

spiky projections that are found in developing bone