connective tissue proper Flashcards
connective tissue
-fills internal spaces
- provide structural support
- stores energy
connective tissue components
- specialized cells (creating or maintaining material)
- extracellular protein fibers
- fluid called ground substance
matrix
extracellular fibers and ground substance
- most volume of connective tissue is matrix, not cells
connective tissue proper
has matrix of fibers (loose and dense fibers) in a maple syrup-like ground substance
fluid connective tissue
matrix of cells and proteins in a liquid ground substance (blood and lymph)
supporting connective tissue
matrix of proteins fibers in a gel or a sold ground substance
cartilage and bone
mesenchyme
mesoderm forms the mesenchyme (first connective tissues)
- consists of mesenchymal stem cells and a matrix of viscous fluid with few protein fibers
origins
mesenchyme begins to lay down fibers and ground substance, fibers become denser and the MSC’s differentiate into other cell types
fibroblasts
create all connective tissue
fibrocytes - maintain tissue
fibers of connective tissue
collagen fibers
elastic fibers
reticular fibers
collagen fibers
thickest of fibers, somewhat flexible and the strongest
- give ligaments and tendons their resilience and strength
tensile strength
elastic fibers
thinner than collagen, stretch easily, branch and rejoin
- allows structures such as blood vessels to stretch and relax
reticular fibers
thinner than collagen fibers, forms a branching woven network
- found in organ with abundant space such as liver, lymph nodes, and spleen (stabilize and supports)
tough but flexible, resist forces appled from many directions
elastic fibers
thinner than collagen, stretch easily, branch and rejoin, wavy (recoil)
loose connective tissue
areolar tissue
adipose tissue
reticular tissue
areolar tissue
found surrounding blood vessels, nerve bundles, muscle, and organs
cushions organs, provides support but permits movement, defense against pathogens
adipose tissue
found under the skin, around the heart, and padding around the joints
padding and cushions shock, insulates, stores energy
reticular tissue
found in the kidney, lymph nodes and spleen
provides supporting framework
areolar tissue
cushions organs, provides support but permits movement, all cells of connective tissue proper found here,
in the skin, respiratory, urinary tracts, between muscles, around blood vessels nerves and joints
have macrophages, mast cells, fibrocytes,
adipose tissue
deep to skin, sides, buttocks and breast, padding around eyes and kidney, provides padding and cushions shocks, insulates heat and stores energy
- composed of only adipocytes
reticular tissue
liver, kidney, spleen, lymph nodes and bone marrow; provides supporting mesh framework
dense connective tissue
dense regular
dense irregular
dense elastic
dense regular
collagen fibers packed tightly, no stretch, found in ligaments and tendons
provides firm attachment, stabilizes bones
dense irregular
throughout entire body, bundles of collagen running in all directions. found covering blood vessels, dermis of skin, sheath around periosteum and periochondria, duct tape of body
provides strength to resist forces in many directions
dense elastic
has stretch and recoil properties, found inanely two places, walls of the aorta and the ligaments flavum (spine) (between vertebrae of spine)
springey and resilient, expansion and contraction
dense regular
tendons, ligaments, covering skeletal muscles
- densely packed parallel bundles of collagen fibers
- provides attachment and reduces friction between muscles, withstands great tension, stabilizes, a few elastic fibers, fibroblasts
dense irregular
irregularly arranged collagen fibers, some elastic fibers, fibroblasts
- able to withstand tension in many directions, helps prevent over expansion of organs, in capsules of visceral organs, in the skin and periosteum of bone
dense elastic
walls of the aorta and the ligaments flavum (spine)
- stabilizes position of vertebrae and permits expansion and contraction of organs
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