Supporting tissues Flashcards

1
Q
A

Elastic cartilage (orcin)
* staining:
– hematoxylin – a basic dye, binds to negatively charged molecules, e.g.
DNA (in the nucleus)
– orcein: indicates the elastic fibers, membranes
* connective tissue types located in the section:
– elastic cartilage
– dense irregular CT
* connective tissue fibers located in the section:
– elastic fibers
– collagen fiber (orcein does not stain)
* connective tissue cells located in the section:
– Fix cells
* chondroblast
* chondrocyte
* fibrocyte

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2
Q
A

Hyaline cartilage HE
perichondrium
str. fibrosum
str. chondroblasticum
cartilage
interterritorial matrix
chondron (“territorium”) as histological unit
intraterritorial matrix
lacuna
chondrocyte

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3
Q
A

Fibrocartilage (HE)
interterritorial matrix
bundles of collagen fibers
chondron (“territorium”) as histological unit
intraterritorial matrix
lacuna
chondrocyte

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4
Q
A

bone
* staining: unstained
– Ground  the inorganic substance is observable
* connective tissue types located in the section:
– lamellar (matured/ secondary) bone tissue
* connective tissue fibers located in the section:
– There are NOT fibers in the section
– remark: the lamellae contain spiral collagen fibers (as organic
element)
* connective tissue cells located in the section:
– There are NOT cells in the section
– remark: in the living bone the osteocytes are sitting in the
lacunae, and their processes are located in the canaliculi

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5
Q
A

Endochondral ossification HE
(1) 2 locations of bony development
① Primary ossification center
A. Bony development occurring in diaphysis
(A) Filled with red bone marrow
② Secondary ossification center
A. Bony development occurring in epiphysis (distal articular ends)
(A) As bone continue to elongate and increase in diameter
* ossification center→ cartilage is replaced
o But, cartilage : epiphyseal growth plate
(2) Occurs in 5 zones
① Resting Zone
A. chondrocytes are present in hyaline cartilage
② Proliferative Zone
A. chondrocytes divide & arrange parallely
③ Hypertrophic Zone
A. swollen chondrocytes & the glycogen in their cytoplasm are present
④ Calcification Zone
A. chondrocytes die & ECM calcifies here
⑤ Ossification Zone
A. lack of the chondrocytes
B. bone tissue presented

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