Term
| what is the most abundant and diverse tissue? |
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Definition
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Term
| Main classes of connective tissue |
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Definition
connective tissue proper=ordinary
cartilage
bone tissue
blood |
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Term
connective tissue:
cells are seperated by -
contains-
common embryonic orgin- |
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Definition
large amount of extracellular matrix- ground substance (proteins, sugars, water)
protein fibers
mesenchyme |
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Term
| Categories for connective tissue proper: |
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Definition
loose- areolar and adipose
dense- dense irregular and regular |
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Term
| In loose areolar connective tissue the cell/protein fiber ratio is: |
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Definition
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Term
| What does loose areolar connective tissue do? |
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Definition
supports/holds together other tissues
holds body fluids, ground substances hold large amounts of water (sponges)
defends body against infection- contains large number of immune cells
stores nutrients as fat |
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Term
Areolar Connective Tissue is:
location:
function: |
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Definition
A model connective tissue
-underlies some epithelial
-surrounds small nerves and blood vessels
-packages organs
-borders all other tissues in body
Function:
- wraps and cushions organs, holds and conveys tissue fluid, role in inflamation |
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Term
| areolar connective tissue has a gel like- |
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Definition
matrix with 3 fiber types that provide support
-collagen, reticular, elastic (elastin) |
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Term
| What are the cells that produce fibers for the areolar connective tissue and ground substance? |
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Definition
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Term
| How are the areolar connective tissues the main battlefield in fight against infection? |
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Definition
defenders gather in tissue at sites of infection :
macrophages-phagocytosis
plasma cells - antibodies
mast cells- histamine (inflamation)
neutrophils, lymphocytes, eosinophils |
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Term
| What are other loose connective tissues? |
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Definition
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Term
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Definition
closesly packed adipocytes (fat cells)
Have nucleus pushed to one side by fat droplet |
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Term
| function of adipose tissue? |
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Definition
provides reserve food for fuel
insulates against heat loss
supports and protects organs
hormone production (leptin) |
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Term
| location of adipose tissue? |
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Definition
| under skin, around kidneys, behind eyeballs, w/abdomen, and in breasts |
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Term
Describe reticular connective tissue?
function:
location: |
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Definition
network of reticular fibes (type 4 collagen) in loose ground substance
functions to form a soft internal skeleton (stroma) supporting other cell types
Located in lyphoid organs (lymph nodes, bone marrow, and spleen) |
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Term
| What is the protein fiber/cell ratio in dense connective tissue? |
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Definition
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Term
| describe dense irregular connective tissue |
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Definition
primarily irregularly arranged collagen fibers
some elastic and fibroblasts |
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Term
| Function of dense irregular CT: |
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Definition
| withstands tension and provides structural strength |
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Term
| location of dense irregular CT |
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Definition
| dermis of skin, submucosa of digestive tract, fibrous capsules of joints and organs |
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Term
| describe dense regular connective tissue: |
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Definition
primarily parallel collagen fibers
fibroblasts and some elastic fibers
poorly vascularized |
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Term
| function of dense regular connective tissue: |
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Definition
| attaches muscle to bone, bone to bone, and withstands great stress in one direction |
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Term
| location of dense regular connective tissue: |
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Definition
tendons and ligaments
aponeuroses
fascia around muscles |
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Term
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Definition
firm, flexible tissue
contains no blood vessels or nerves
extracellular matrix is 80% water
is surrounded by perichondrium (connective tissue proper)
Resilient tissue- springs back to original shape |
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Term
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Definition
| chondroblasts(produce matrix) and chondrocytes (lie in lacunae) |
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Term
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Definition
hyaline
elastic
fibrocartilage |
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Term
hyaline cartilage (glass)-
function/location- |
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Definition
most abundant
provides support thru flexibility
imperceptible collagen fibers (glassy)
functions to support and reinforce, resilent cusion, resists repetive stress
Location: fetal skeleton, ends of long bones, costal cartilage of ribs, cartilages of nose trachea and larynx |
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Term
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Definition
contains many elastic fibers, able to tolerate repeted bending; great flexibility
maintains shape and structure
located in external ear and epiglottis |
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Term
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Definition
resists strong compression and strong tension- intermediate between hyaline (less firm) and elastic
thick collagen fibers predominate
tensile strength and ability to absorb compressive shock
located in intervertebral discs, pubic symphysis, and discs of knee joint |
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Term
| What is appositional growth? |
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Definition
| Cartilage growth at edges when chondroblasts in surrounding perichondrium produce new cartilage |
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Term
| What is interstitial growth> |
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Definition
| chondrocytes within cartilage divide and secret new matrix. |
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