connective tissue

CONNECTIVE TISSUE

Ground substance

Protein fibers

+

- collagen: strong & flexible

- elastic: strong & stretchy

- reticular: thin & branched

- fluid

- semi-fluid

- gelatinous

- calcified

has good blood & nerve supply except in tendons & cartilage

AREOLAR

DENSE

CARTILAGE

Widely distributed

Randomly arranged collagen, elastic, reticular fibers

ECM: gelatinous

strength, elasticity, support

REGULAR

HYALINE

LOOSE

ADIPOSE

RETICULAR

Contains adipocytes for triglyceride storage

Derived from fibroblasts

Reduces heat loss, energy reserve, support & protect organs

Network of fibers & reticular cells

IRREGULAR

ELASTIC

ELASTIC

FIRBOCARTILAGE

WHITE: stores energy, insulates, cushions

BROWN: rich blood supply & pigmented mitochondria fetus & infants

collagen fibers w/ parallel bundles of fibroblasts

strength along fibers

forms tendons & ligaments

collagen fibers irregularly arranged; few fibroblasts

"tough" tissue

faciae: sheets beneath skin

mostly elastic fibers with fibroblasts in b/w

stretchy & resilient

packing material around ~every structure

Forms stroma of organs

weakest; easily broken

Abundant chondrocytes in lacunae

GS is resistant GEL

threadlike network of elastic fibers; perichondrium present

shape, elasticity & pliable

thick bundles of collagen fibers & chondrocytes; no perichondrium

strongest

ends of joints

ear, nose, vocal cartilage, epiglottis

pubic symphysis, intervetebral discs, menisci of knee

CHONDROCYTES: mature cartilage cells

Bone

Blood

Mineralized ECM:

calcium & phosphate=hardness

Interwoven collagen fibers=strength

Osteocytes

Osteons: basic units of compact bone

Erthyrocytes, leukocytes, platelets

Forms clots, immunity O2 & CO2 transport, nutrients, wastes

Found within vessels & heart chambers

MESENCHYME

irregular in semifluid GS w/ delicate reticular fibers