Connective Tissue Flashcards
4 functions of the Connective Tissue
- Resist stress
- Immunity
- Organize Tissues
- Metabolic
Embryonic Origin of the Connective Tissue
Mesenchyme
Connective Tissue has relative ______ cells
Few
Connective Tissues have _______ extracellular matrix
Lots of / abundant / large amount of
Connective Tissue has a significant network of?
Blood Vessels
3 Components of Connective Tissue
- Cells
- Protein Fibers
- Ground Substance
Most common cells in the connective tissue proper
Fibroblasts
Fibroblasts originate from where?
Mesenchymal Cells
If fibroblasts are active cells, what are are the inactive or quiescent cells?
Fibrocytes
Derived from the precursor cells called monocytes
Macrophages / Histocytes
Are antigen presenting cells
Macrophages
Also known as Signet Ring Cells
Fat Cells / Adipose Cells / Adipocytes
Adipocytes store what?
Neutral Fats
- Usually ovoid with a small, centrally placed nucleus
- Cytoplasm filled with strongly basophilic granules containing histamine
Mast Cells
Derived from B Lymphocytes
Plasma Cells
- Highly specialized for antibody synthesis
- Has a cart wheel or clock face arrangement of nucleus
Plasma Cells
Most abundant WBC
Neutrophils
Amorphous substance that fills the space between the cells and fibers
Ground Substance
Macromolecules in the Ground substance
- Glycosaminoglycans (GAGs)
- Proteoglycans
- Proteins (fibronectin)
Type of Protein Fiber
- tough, thick, fibrous protein
- most abundant type of fiber in the CT
Collagen Fibers
Type of Protein Fiber
- Thin, and forms delicate netlike support framework
- Consists mainly of Collagen Type III
Reticular Fibers
What is it called when a tissue or organ can only be visible when stained with silver stain?
Argyrophilic
Type of Protein Fiber
- thin, small, branching fibers that allow stretch
Elastic Fibers
3 types of protein fibers?
- Collagen Fibers
- Reticular Fibers
- Elastic Fibers
Most common type of Collagen Fiber
Type I CF
Type of Collagen Fiber that is thin, branching reticular fibers that form delicate supporting meshwork
Type III CF
Type of Collagen Fiber that is the basal lamina of the basement membrane
Type IV CF
Two basic groups of Connective Tissue
- Connective Tissue Proper
- Special Connective Tissue
2 types of Connective Tissue Proper
- Loose
- Dense
3 types of Loose connective tissue
- Areolar
- Reticular
- Adipose
3 types of Dense Connective Tissue
- Irregular
- Regular
- Elastic
A loose connective tissue with Gel like matrix with all 3 fiber types; Fibroblasts, macrophages, mast cells, and some WBCs
Areolar Connective Tissue
-Provides reserve fuel
-Insulates against heat loss
-Supports and protects organs
Adipose Tissue
Network of reticular fibers in a typical loose ground substance; reticular cells lie on the network
Reticular Connective Tissue
Primarily irregularly arranged collagen fibers; some elastic fiber; major cell type is the fibroblasts; defense cells and fat cells are also present
Dense Irregular Connective Tissue
Primarily parallel collagen fibers; a few elastic fibers; major cell type is the fibroblast
Dense Regular Connective Tissue
Dense regular connective tissue containing high proportion of elastic fibers
Elastic Connective Tissue
2 embryonic connective tissues
- Mesenchyme
- Mucous Connective Tissue
Specialized Connective Tissue
- First connective tissue to appear in a developing embryo
- Tissue not found in adults
- Contains mesenchymal cells
- Gives rise to all other connective tissues
Mesenchyme
Specialized Connective Tissue
- Principal component of the fetal umbilical cord, where it is referred to as Wharton’s Jelly
- Gelatinous due to abundant ground substance mainly composed of hyaluronan
- Sparse collagen fibers and scattered fibroblasts
Mucous Connective Tissue