connective ue

What is the most abundant type of tissue by weight in the body?

connective

what is the major protein found in connective tissue?

collagen

what are the 8 functiond of connective tissue?

binds structures

provides support and protection

serves as frameworks

fills spaces (remeber there is no empty space in the body)

stores fart

produces blood cells

protects against infection

helps repair damaged tissue

what is extracellular matrix made of?

protein fibers, ground substance, and fluid

what are the specific characteristics of connective tissue?

cells are further apart, cells can divide, variation in blood supply

Matrix

abundant intercellular material, non living, varies from fluid to semisolid (areolar) to solid (bone)

collagen elastin and reticular are what

fibers

fibroblast (fixed cell)

most common, star shapedm produces protein fibers (collagen and elastin)

mast cells (fixed cells)

usually near blood bessels, releases jeparin and histamien

macrophages / histiocytes (wandering cells)

originate as whie blood cells

carry out phagocytsois

aooear in injury or infection

collageneous fibers

thick threads of proteins that run parallel bundles

• major structual protein

  • skin, bone, cariytalige, ligaments, tendons

  • flexible but not stretchy

  • high tensile strength

  • fibers

elastic fibers

thins proteins of elastin

stretches easily and retains thuer shape

branch to form networks

called yellow fibers and found in vocal cords

reticular fibers

thin collagenous fibers, delicate and branch netwroks

'syupports soft mesh in tissues such as spleen, bone marrow, and lymphatic system organs

connective tissue has 2 major categories and specialized types

connective tissue proper and dense connective

what are in the connective tissue proper ctaegory

aerolar, adipose, reticular

what is in the dense connective category

dense regular, dense irregular, elastic

what are the specialized connective tissues

caryilage, bone and blood

loose connective / aerolar

forms delicate thin membranes (cobwebs), most widely distributed

contains fibroblasts, gel like ground substance, collagen, elastin

lies underneath most epithelium

has lots of nourshig blood vessles

adipose tissue /fat

develops when adipoctyes form fat droplets in cytoplasm

lines beneath skin for insulation, around kidneys, surfcae of the heart,m behind eyeballs

cushooms joints and organs

stores energy in fat molecules

reticular connective tissue

thin reticular fibers

3d network

provides framwork for organs (ex libver and spleen)

dense regular

few cells (mostly fibroblasts)

contains closely packed, thick, collagenous fibrs with fine network of eostaic (withstands pulling)

tendons (muscle to bond) and ligament (bone to bone)]

white part of eye

poor blood supply

cartilage

a rigid connective tissue that lacks a direct blood supply

rpvodies supprit framworks and attacthemnt

protects underlying tissues

forms structural models for many devleoping mondys

called “chondrocytezs” and found in “lacunae”

there are 3 types of cartilage distryinged by their matrix

hylaine, elastic, and fribrocartiliage

hylaine

msot common type of cartilage

fines collafgenous fibers, resembles white glass,

found on ends of the bones, soft part of nose, supprots front of rib cages

makes up mmsot of fetal skelton

elastic cartilage

dense networks of elastic fibers, more flexible than hyliners

in externela ear aand parts of the larynx

fibrocartilage

a very tough tissues with collage fibers in matrix

shock absorber for pressure strutues such as discs between vertebrs or cushions boens in the knee

bone

most rigid connective ttissue, hardness due to mneral salts and collagen in matrix, supports body structures, protects vital organas and attatchment fot musckles

osteocyte cells in lacuna

osteocytes are clustered around ____

osteonic canals

osteon

a cylinder shaprd unit consiting of the osetonic canal and osteocytes

canaliculi

cellular processes that connect nearby cells (gap juncyions)

blood

designed to transport substances, helps maintain homeostastic, fluid matrix (plasma)

red blood cells

transport gases

white blood cells

fight infection

plaetelets

blood clotting