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Flashcards in Connective Tissue Deck (28)
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1

Fibroblasts are

Renews except for

Other cells in ct

Flat large branching cells
*most common cell type in CT
*fixed

Except for cartilage

WBC

2

CT tissue fibers are

Collagen
Elastic
Reticular

3

Collagen
(CT fibers)

Primary fiber type (except for blood)
*composed of protein, collagen

4

Elastic
(CT fiber)

Microfilaments embedded in protein
*elastin- stretches and returns to original form

5

Reticular
(CT fiber)

Seen in embryonic structures
*reticulin- mesh like arrangement

6

CT classification

Soft (adipose)
Firm (cartilage)
rigid (bone)
fluid (blood and lymph)

7

Soft CT is made up what 3 CT types:

Loose- just deep to epithelium
dense- deep to loose
Specialized- adipose, elastic, reticular

CONNECTIVE TISSUE PROPER

8

Functions

Support
Packaging
Storage
Transport
Repair
Defense

9

Firm CT definition

Function

Noncalcified CT associated with Skelton

Temporary skeleton
Covers most joint articular to surfaces
Forms outline for bone formation

10

Firm CT comprised of....

Avascular meaning..

Matrix of cells, mainly collagen
*more flexible than bone, doesn't mineralize

Can't renew itself, relies on surrounding tissues for nutrition

11

Cartilage:
Hyaline

Elastic

Fibrocartilage

Most common, only collagen
*epiphyseal plates

Mix of collagen fibers and elastic
*ear, Eustachian tube, epiglottis, larynx

Characteristics of the above 2
*transitional in nature, going from one to the other ex:tmj

12

Rigid CT

Functions to...

Most specialized CT...

Support, protection and locomotion

Vascular- can repair itself
*calcified and mineralized CT

*most specialized and abundant
*forms mature skeleton

13

Bone components:

Diaphysis

Epiphysis

Articular cartilage

Epiphyseal plate

Epiphyseal line

Central shaft of bone

2 ends of long bone

Covers epiphysis where it articulates with another bone

Cartilage b/w diaphysis and epiphysis, where bone grows

Mineralization of plate

14

Bone cavities:

Medullary cavity

Marrow
*yellow
*red

Within the diaphysis
*marrow fills these cavities

Y-mostly fat
R- blood forming cells

15

Bone linings:

Periosteum

Endosteum

Outer covering of bone *blood vessels and nerves of bone

Lines medullary cavities *inside

16

Bone cells:

Osteoblasts

Osteoclasts

Canaliculi

Bone forming cells, cuboidal, found in Peru and endosteum

Bone destroying cells *osteocytes-mature osteoblasts

Processes from osteocytes. *little channels that connect 2 osteocytes to communicate

17

Compact bone:

Mostly a sold matrix of cells
*inferior border mandible- more solid for strength
*outside bone

18

Cancellous bone:

Lacy network of bone with small marrow filled spaces
*light bone, strength without weight

*covered by compact bone
*spongy bone

19

Bone layers:

Circumferential

Concentric

Interstitial

Surrounding outer perimeter of adult bones

Bulk of compact bone. Metabolic unit-osteon-osteocytes

In between concentric circles
*concentric rings-haverson canal *each canal has laminae and osteon

20

Bone ossification:

Osteoblast (3)

1. Start formation
2. Synthesize collagen and proteoglycans
3. Once surrounded by matrix

*when matrix is around osteoblast it is then called osteocyte

21

Bone ossification:

Osteocyte (2)

1. Intramembraneous ossification
2. Endochondral ossification

22

Bone formation:

Endochondrial

Intramembraneous

Forms ramus of mandibular and zygomatic arch

Alveolar process, body of mandible and maxillary process of maxilla

23

Endochondrial ossification:

Cartilage models

Hyaline surrounded by perichondrium
*has blood supply

24

Endochondrial ossification: Chondrocytes form a matrix

(3 pts)

1.osteoblasts created in perichondrium
*start to make bone
2. Cartilage does a mineralization occurs.
3. Perichondrium becomes periosteum

25

Intramembraneous ossification:

Osteoblasts from osteoid b/w...

CT membranes
*osteoblast between 2 membranes

26

Intramembraneous oss:

Trabeculae may be replaced to form..

Compact bone

27

Bone remodeling:

Osteoblasts

Osteoclasts

Growth

Create bone

Destroy bone

Growth and bone changes are influenced by pressure and tension forces on bone

28

Bone remodeling:

Calcium storage (2 pts)

Calcium stores are in constant flux
Hormones control
*hormone imbalance makes bones brittle