Lab 2 Flashcards
Extra cellular matrix
The non-cellular component present within all tissues and organs
Could be fluid, gelatinous, semi-solid or solid
Collagen fibers
is the fiber in the extracellular matrix of connective tissues
characterized by being elongated and made up of collagen glycoproteins.
It is typically arranged in branching bundles of indefinite length. It is a strong insoluble fiber.
It occurs in the skin, tendon, ligaments, bone, and cartilage
What are the 3 types of fibers in connective tissue?
Collagen, reticular, elastic
Elastic fibers
an essential component of the extracellular matrix
composed of bundles of proteins (elastin)
able to stretch many times their length, and snap back to their original length when relaxed without loss of energy.
Found in the skin, lungs, arteries, veins, connective tissue proper, elastic cartilage,
Reticular fibers
A type of connective tissue fiber that is made up of type III collagen secreted by reticular cells
looks like a net mesh network with other similar fibers to serve as a supporting mesh in soft tissues such as liver and bone marrow
What are some common cells found in connective tissue?
Mesenchymal cells - self-renew by dividing and can differentiate into multiple tissues
Fibroblasts - secrete collagen proteins that are used to maintain a structural framework
Mast cells - white blood cell that is found in connective tissues & contributes to homeostasis in the immune system
Macrophages - type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.
White blood cells - are part of the body’s immune system.
Fibroblasts
A cell that synthesizes the extracellular matrix and collagen,produces the structural framework (stroma) for animal tissues,
Plays a critical role in wound healing.
Fibroblasts are the most common cells of connective tissue in animals.
Areolar connective tissue
What tissue group?
What directions do the fibers run?
Cells/Fibers?
Function?
Found?
Tissue: Loose connective tissue
Direction: Running in all directions
Cells: Fibroblast, mast, macrophages, white blood cells
Fibers: Reticular, elastic, collagen
Function: Provides cushioning to many organs and tissues of the body.
Found: It can be found in the skin as well as in places that connect epithelium to other tissues
Stroma
The supportive framework of an organ, gland or other structure, usually composed of connective tissue
Chondrocytes
Cartilage cells
The only cells found in healthy cartilage. They produce and maintain the cartilaginous matrix, which consists mainly of collagen and proteoglycans.
Lacunae
Isolated spaces that hold cells.
Osteons
is the fundamental functional unit of much compact bone. Have
roughly cylindrical structures
Central canal aka Haversian canal
through which blood vessels, lymph vessels, and nerves can travel to service and signal the cells throughout the compact bone. .
Osteocytes
Osteocytes are the longest living bone cell and Reside within the lacuna
What are the formed elements in blood?
Erythrocytes- red blood cells
Leukocytes- white blood cells
Platelets
What are the 3 basic parts of a neuron?
Cell body aka perikaryon
Axons
Dendrites
Cell body or perikaryon
the cell body of a neuron, containing the nucleus.
Epidermis
Outer thinner layer comprised of stratified squamous epithelium
Dermis
The inner thicker connective tissue layer
Subcutaneous aka hypodermis
Deep into the dermis
Consists of adipose and areolar connective tissues
Adipose connective tissue
What tissue group?
What directions do the fibers run?
Cells/Fibers?
Function?
Found?
Tissue: Loose connective tissue
Direction:
Cells: composed of fat cells known as adipocytes.
Fibers: Thin extracellular matrix consisting of reticular fibers
Function: Energy storing, hormone production, thermal isolation
Found: Hypodermis, surrounding the kidneys, eyeballs and yellow bone marrow
Reticular connective tissue
What tissue group?
What directions do the fibers run?
Cells/Fibers?
Function?
Found?
Tissue: Loose connective tissue
Direction: branched and mesh-like pattern
Cells: Fibroblasts called reticular cells
Fibers: Reticular fibers
Function: to form a stroma and provide structural support
Found: found in the Liver, kidney, the spleen, lymph nodes, and bone marrow.
Dense regular connective tissue
What tissue group?
What directions do the fibers run?
Cells/Fibers?
Function?
Found?
Tissue: Dense connective tissue
Direction: the collagen fibres are densely packed, and arranged in parallel
Cells: Fibroblasts
Fibers: Collagen fibers
Function: to transmit forces over a distance and to connect different organs/muscles
Found: Tendons and aponeuroses, most ligaments