What are the 6 different classifications of Connective tissue?
Embryonic Blood & lymph Bone Cartilage Connective Tissue Proper haemopoietic tissue
What are the 3 main fibres of CT ?
Collage Reticular Elastic
What are the properties of this Fibre?
Collagen -strong, flexible, -white, fibrous -eosiniphilic in H & E
What are the properties of this fibre?
Reticular - fine network -poorly stained in H&E, black in reticulin
What are the properties of this fibre?
Elastic Stretchable, elastic Yellow fibrous tissue eosinophilic in H&E black in verhoeffs stain
Name the 4 tissue types that comprise all the organs of the body in some combination:
- Connective Tissue 2. Epithelial tissue 3. muscular tissue 4. nervous tissue
What are the functions of connective tissue proper?
support protection connections within locomotor system holds tissues together energy storage
What is a “loose” type of connective tissue proper?
higher ratio of cells to fibres
What is a “dense” type of connective tissue proper?
lower ratio of cells to fibres - regularly arranged -irregularly arranged
Name the 7 cell types of CTP
- mesenchymal cells 2. fibroblast 3. fibrocyte 4. macrophage 5. adipocyte (fat cell) 6. mast cell 7. plasma cell
Name this cell:
Mesenchymal cell:
stellate - star shaped, many cytoplasmic processes
- oval/round nucleus
- in embryonic tissue
Name this cell:
Fibroblast:
stellate/spindle shaped
basophilic cytoplasm
synthesize and secrete collagen and other extracellular matric components
differentiate into FIBROCYTES
cytoplasm looks purple
Name this cell:
Fibrocyte:
- small flattened elongated cell
“resting” form of fibroblasts - no longer highly active in secretions
Name this cell:
Macrophage:
large cell
derived from blood monocyte
phagocytic cell
produces lysosomal proteases
Name this cell:
Fat cells (adipocytes):
- accumulate fat droplets in cytoplasm
- fat droplets coalesce to form single large fat droplet
- nucleus displaced to side of cell
- energy storage, insulation and protection
Name this cell:
Mast Cells:
- scatter, low numbers in most CT
- cyto filled with granules containing heparin, distamine, serotonin, proteases
- degranulate when tissue damaged
Name this Cell:
Plasma Cell:
- B lymphocyte actively producing antibody
- abundant basophili cytoplasm
