cartilage, bone, muscle
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Microscopic structure ofMicroscopic structure of
cartilage, bone and muscle.cartilage, bone and muscle.
(textus cartilagineus,textus osseus and textus muscularis )
GhufronGhufron
Dept. of Histology and Cell BiologyDept. of Histology and Cell BiologySchool of Medicine UGMSchool of Medicine UGM
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CARTILAGECARTILAGE
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Cartilage Tissue
• cells called chondrocytes
• gel-like ground substance containingproteoglycans and glycosaminoglycans.
• elastic, inelastic, or reticular fibers.
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Matriks CartilagoMatriks Cartilago
Basic histology 11th ed
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HYALINE CARTILAGEHYALINE CARTILAGE
ELASTIC CARTILAGEELASTIC CARTILAGE
FIBROCARTILAGEFIBROCARTILAGE
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HYALINE CARTILAGEHYALINE CARTILAGEHISTOGENESIS HYALIN CARTILAGEHISTOGENESIS HYALIN CARTILAGE
mesenchyme highly cellular tissue chondroblas separatedmultiplication of
isogenous grou
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PERICHONDRIUMGROUND SUBSTANCE
LACUNACHONDROCYTE
articular cartilagecostal cartilage,
trachealarynx
HYALINE CARTILAGE
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PERICHONDRIUM
PERICHONDRIUM
CHONDROCYTE
stratum chondrogenicum
stratum fibrosum
HYALINE CARTILAGE
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CHONDROBLAST
CHONDROCYTES
ELASTIN
Elastic cartilage – elastin fibers in the matrix
*AURICULA*EPIGLOTTIS
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ELASTIC CARTILAGE
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aligned cells with bundles of collagen
FIBROCARTILAGE
LACUNA
COLLAGENFIBERS
CHONDROCYTES
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Cartilage Locatedin the Human
Skeleton
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BONE TISSUEBONE TISSUE
* CELLS (OSTEOCYTES)* CELLS (OSTEOCYTES)* MATRIX* MATRIX
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Cells in bone:*Osteoprogenitor cells differentiate into
Osteoblasts.*Osteoblasts synthesise new matrix
Osteogenesis
*Osteocytes = mature bone cellsIn lacunae
Connected by canaliculi
*Osteoclasts dissolve bone matrix Osteolysis
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Cells Associated with Bone Tissue
osteoprogenitor cells: derived from
mesenchyme these differentiate into
osteoblasts.
osteoblasts: bone forming cells whichsecrete the osteoid and then calcify it.
osteoclasts: bone resorbing cells derivedfrom monocytes.
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The Histology of Compact Bone
osteoclast resorption bone remodellingin response to growth; participate in the
long-term maintenance of blood calciumhomeostasis
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MATRIX :MATRIX :
collagen fibers (type I)
proteoglycans (glycoproteins)Hydroxyapatite: inorganic salt of
calcium and phosphorus
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Basic histology 11th ed
Basic histology 11th ed
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HAVERSIAN SYSTEM
Basic histology 11th ed
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An Osteon
canaliculi.
The Haversian Canal
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The Haversian Canal
((ØØ longitudinal)longitudinal)
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Concentric
lamellae.
Interstitiallamellae
Osteons Produce the DenseArrangement in Ground Bone Tissue
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Compact bone and spongy bone
Basic unit of compact bone is an osteon –Osteocytes arranged around a central
canal –Perforating canals extend between
adjacent osteons
•Spongy bone contains trabeculae
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O:OSTEOBLASTC:COLLAGEN
PERIOSTEUM
DEVELOPING BONE
ACTIVE PERIOSTEUM FROM DEVELOPING BONE
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EXTEND DEEPLY INTO THE BONY CORTEX
MUSCULAR INSERTION INTO BONE
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BONE HISTOENESISBONE HISTOENESIS
* INTRAMEMBRANOSA* INTRAMEMBRANOSA
* ENDOCHONDRAL* ENDOCHONDRAL
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MUSCLEMUSCLE
TEXTUS MUSCULSRIS NON STRIATUSTEXTUS MUSCULSRIS NON STRIATUS
TEXTUS MUSCULARIS STRIATUSTEXTUS MUSCULARIS STRIATUS
TEXTUS MUSCULARIS CARDIACUSTEXTUS MUSCULARIS CARDIACUS
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Basic histology 11th ed
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SKELETAL MUSCLE
art, vein, nerveFascicle
Muscle Fiber
Tendon
Skeletal Muscle
Deep Fascia
EpimysiumPerimysium
Endomysium
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Connective Tissue Wrappings
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Basic histology 11th ed
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Basic hisyology 11th ed
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*MYOFIBRA
*SARCOLEMMA (MP)*MYOFIBRIL*T TUBULUS*RETICULUM SARCO-PLASMICUM (RE)
TRIAD :1) T TUBULUS
2) SR OF I BAND3) SR OF A BAND
Z
Z
SARCOMER
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JUNCTION OF THE AAND I BANDS TSYSTEM /TUBULUS TRIAD NEAR THEJUNCTION OF THE
I AND A BANDS
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Z ZA band
A band
I band
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Ca2+ +TnC
exposes the myosinbinding site on actin(cross-hatched area)
myosin head binds to
actin
ATP breaksdown into ADB
CONTRACTION