Connective Tissue- Histology Flashcards
Define deep tissue?
never exposed to environment outside of body.
What supports and binds to other tissues?
Cartilage
What stores nutritional substances?
Fats
What produces protective and regulatory substances
ECM
Name some of the most diverse tissues?
Bone, blood and fat
What is connective tissue made ups of?
Superficial Fascia
Deep fascia
Subserous Fascia
Define Superficial Fascia
Between skin and underlying organs
Areloar tissue and fats
Subcutaneous layer or hypodermis
Define Deep Fascia
Forms strong fibrous internal network
Dense connective tissue
Bound to capsules, tendons and ligaments
Define Subserous Fascia
Between serous membranes and deep facia
Areloar tissue
What is connective tissue derived from?
Mesoderm
Define mesoderm
Varys in structure and function
Highly vascularised and well nourished.
Cell adhesion mechanism
Replication and repair
What 3 basic components are found in connective tissue and define them?
Specialised cells - Fibroblasts and osteocytes Protein Fibres - Collagen Ground substances - Fills all spaces between cell fibres and ground substances MATRIX Largest volume of connective tissue
What components consist in the supporting of connective tissue?
Bone and cartilage
What components consist in the supporting of fluid in the C.T?
Blood and Lymph
What components consist in the supporting of THE PROPER in the C.T?
Loose and dense C.T
Name the 5 supporting cells in connective tissues?
- Fibroblasts
- Chondrocytes
- Osteocytes
- Myofibroblasts
- adipocytes
What are the 3 connective tissue fibres and describe them?
•Collagen
Long, straight, branched, strong, flexible
•Reticular
Thinner than collagen, forms branching interwoven
network
•Elastic
Branched, wavy, after stretching returns to normal
Define the embryonic classification of C.T?
During development, migrates and interacts with other tissues to form organs
Some mesenchyme persists past embryonic period:
Undifferentiated cells around blood vessels (fibroblasts) which repair the vessel.
Define the connective tissue proper classification?
Large spindle shaped cell (fibroblast).
- Produces collagen, elastic and reticular fibres.
- Loose flexible matrix.
•Six basic types distinguished by matrix, and type and arrangement of fibres.
Define Loose C.T?
Flexible strength in all directions (skin)
Define Dense Regular C.T?
Densely packed collagen fibres parallel to direction of force (tendons and ligaments)
Define Dense Irregular C.T?
Densely packed collagen fibres (dermis of skin)
Define elastic C.T?
Elastic fibres that can stretch 1.5 times and return.
walls of large arteries
Define Reticular C.T?
Jellylike matrix (forms framework of organs such as liver and spleen)
Define Adipose C.T?
Cells store fat droplets. Acts as food reserve, protects organs and insulator.
Define the cartlidage classification?
Cell Chondrocyte
Semisolid matrix with marked elastic poperties
- Supportive and protective CT frequently associated with bone
- Avascular (difficult to heal)
- Three types – based on type and amount of fibres embedded within matrix
What is the location and function of hyaline cartridge?
Location- Between the tips of ribs and bones of sternum covers synovial joints
Function- Stiff but flexible support and reduces friction between bony surfaces
What is the location and function of elastic cartridge?
Location- Auricle of the external ear and the epiglottis auditory canal and cuniform cartridges of the larynx.
Function- Provides support and tolerates distortion without damage
What is the location and function of fibrocartridge?
Location- Pads within the knee joint between the pubic bones of pelvis.
Function- Results compression prevents bone to bone contact
What cells are within the vascular connective tissue?
Erythrocytes
Leukocytes
Thrombocytes (platelets)
- Highly specialised - viscous
- Liquid plasma matrix
RBCS
WBCS
- Monocytes
- Lymphocytes
- Eosinophils
- Microphages
- Neutrophils
- Basophils
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