CTL week 4 Flashcards
what is ECM
- Exists within tissues around cells
- Located between cells and fibres and has two major components
- protein fibres (collagen, elastic and reticular)
- ground substance (water and organic molecules)
- allows for substances to be exchanged
what are some features of the 3 protein fibres
- collagen: thick as strong, resists tension from pulling forces
- elastic: recoils to original length after being stretched
- reticular: very thin, branched, fibres, provides support and has a coating of glycoprotein
what are immature cells
-blast
- Most abundant cell, active
- Cells can divide
- Builds and produces extracellular matrix
Ex: fibroblasts, chondroblasts, osteoblasts
what are mature cells
- cyte
- maintains the tissue
-less active, reduced ability to divide
- Produces some extracellular matrix
Ex: fibrocytes, adipocytes, chondrocytes
what is the common origin of connective tissue
mesenchyme
what are the different types of connective tissue proper
loose: areolar, reticular and adipose
dense: regular, irregular and elastic
name the cell, fibre and location, function of loose areolar ct
most abundant connective tissue in the body
function: Provides elasticity, support and strength
cell: fibroblasts and immune cells
fibers: collagen, elastic and reticular
location: nearly every body structure
Ex: lamina propria
name the function, cell, fibre and location of loose reticular ct
Function: forms the stroma (supports organs)
cell: reticular
fiber: reticular (a type of fibroblast)
location: liver, spleen
name the function cell, fibre and location of loose adipose ct
function: Stores triglycerides (fats), Provides insulation, energy source,
cell: adipocytes
fiber: collagen
location: subcutaneous layer of the skin, around the heart and kidney bone marrow
name the function, cell, fibre, location of regular dense ct
function: Forms strong attachments between structures
cell: fibroblasts
fiber: collagen (regularly arranged)
location: forms ligaments and tendons
name the function, cell, fibre, location of irregular dense ct
function: allows pulling in multiple directions
cell: fibroblasts
fiber: collagen (irregular arranged)
location: forms fascia, part of dermis, membrane capsule of some organs
name the function, cell, fibre, location of elastic dense ct
function: allows tissue to recoil
cell: fibroblasts
fiber: elastic
location: forms some ligaments, lungs, walls of arteries
name the different types of supporting connective tissue
cartilage (semisolid matrix): hyaline, fibrocartilage, elastic
bone (solid matrix): compact and spongy
name the function, cell, fibre, location of hyaline cartilage
most abundant
- function: reduce friction at joints and shock absorption at joints
cell: chondrocytes
fibre: very fine cartilage
location: nose, joint, resp airway
name the function, cell, fibre, location of fibrocartilage
Strongest
- Function: Joins surfaces together, provide strength and support
- Cell type: Chondrocytes
- Fibers: thick bundles of collagen
-Location: intervertebral disc, knee joint
name the function, cell, fibre, location of elastic cartilage
Most flexible
Function: helps structures retain their shape, provide strength and elasticity
Cell type: Chondrocytes
Fibres: network of elastic fibres
Location: ear and voice box
name the structure, fibre, location of compact (corticol) bone
Located on the outer surface, mostly diaphysis
Fibre: Collagen
Structure: Osteons
name the structure, fibre, location of spongy (cancellous) bone
Located on the inner surface, mostly epiphysis
Fibres: Collagen
Structure
* Trabeculae
* Parallel lamellae
what are the 2 types of fluid connective tissue
blood and lymph
what are the functions of blood
a fluid connective tissue
Functions
- Transportation: oxygen, carbon dioxide, nutrients and waste
products. - Regulation – homeostasis
- Protection – platelets and white blood cells
what are the function of lymph
a liquid connective tissue
Functions
- Transports dietary lipids
- Drains excess interstitial fluid
-Protection (immune responses)
