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CHAPTER 5.  LAYERS OR GROUPS OF SIMILAR CELLS WITH A COMMON FUNCTION.

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Presentation on theme: "CHAPTER 5.  LAYERS OR GROUPS OF SIMILAR CELLS WITH A COMMON FUNCTION."— Presentation transcript:

1 CHAPTER 5

2  LAYERS OR GROUPS OF SIMILAR CELLS WITH A COMMON FUNCTION

3  TIGHT  DESMOSOME  GAP JUNCTION

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7  EPITHELIAL  CONNECTIVE  MUSCLE  NERVOUS

8 COVERINGS; ALWAYS HAS A FREE SURFACE CONTAINS BASEMENT MEMBRANE LACK BLOOD VESSELS: DIFFUSION READILY DIVIDE TIGHTLY PACKED TIGHT JUNCTIONS/ DESMOSOMES

9 FFUNCTION: ◦P◦PROTECTION ◦S◦SECRETION ◦A◦ABSORPTION ◦E◦EXCRETION

10  SHAPE ◦ SQUAMOUS ◦ CUBOIDAL ◦ COLUMNAR  LAYERS ◦ SIMPLE ◦ STRATIFIED

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13  MOLECULES PASS THROUGH EASILY  DIFFUSION/FILTRATION  EASILY DAMAGED

14  LINES FOLLICLES AND TUBULES: MORE STRUCTURE

15  MAY BE CILIATED  MORE PROTECTION  ABSORPTION & SECRETION

16 NUCLEI AT 2 LEVELS CILIA COMMON GOBLET CELLS RESPIRATORY SYSTEM

17  SHAPE OF TOP LAYER  PROTECTION  PREVENT H 2 O LOSS  SKIN, ORAL CAVITY

18  USUALLY 2 OR 3 LAYERS  MORE PROTECTION/ STRUCTURE  GLAND TUBES, TUBULES plecub.jpg

19  2 OR 3 LAYERS  MORE PROTECTION/ STRUCTURE  MALE URETHRA, PHARYNX

20  SPECIALIZED CELLS OF SECRETION  WITH CUBOIDAL OR COLUMNAR  GLAND: ONE OR MORE CELLS  TYPES OF GLANDS ◦ EXOCRINE ◦ ENDOCRINE

21  SINGLE CELL GLAND  MULTICELLULAR GLAND

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23 MEROCRINE: FLUID RELEASED APOCRINE: SMALL PORTIONS OF CELL BODIES HOLOCRINE: ENTIRE CELL RELEASED

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26  SEROUS: WATERY  MUCUS: THICK, MUCIN; BY MUCOUS GLANDS AND GOBLET CELLS MUCOUS GLAND nctivaEMnormalGoblet jpg GOBLET CELL

27 MMOST ABUNDANT BY WEIGHT EEXTRACELLULAR MATRIX; CELLS SPREAD FFUNCTION: ◦B◦BIND STRUCTURES, SUPPORT, PROTECTION, FRAMEWORK, FILL SPACE, STORE FAT, PRODUCE BLOOD CELLS, PREVENT INFECTIONS, REPAIR DAMAGE

28 GGROUND SUBSTANCE PPROTEIN FIBERS ◦C◦COLLAGENOUS FIBERS; COLLAGEN; TENSILE STRENGTH ◦E◦ELASTIC FIBERS; ELASTIN; WEAKER, ELASTIC, RESUME ORIGINAL SHAPE ◦R◦RETICULAR FIBERS; THIN COLLAGENOUS FIBERS; BRANCHED, FORM NETWORKS

29 FFIXED CELLS ◦F◦FIBROBLASTS MMOST ABUNDANT, MAKE THE FIBERS, ◦M◦MAST CELLS NNEAR BLOOD VESSELS, RELEASE HEPARIN AND HISTAMINE WWANDERING CELLS ◦M◦MACROPHAGES CCAN MOVE, SCAVENGERS AND IMMUNITY, ABUNDANT IN SOME TISSUE

30  LOOSE CONNECTIVE TISSUE  DENSE CONNECTIVE TISSUE

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32  DELICATE, THIN MEMBRANES  GEL-LIKE GROUND SUBSTANCE  UNDER MOST EPITHELIAL TISSUE

33  ADIPOCYTES  ADIPOSE TISSUE  BENEATH SKIN, FILLS SPACE, AROUND ORGANS AND MEMBRANES  CUSHIONS, INSULATION, STORES ENERGY

34  THIN COLLAGENOUS FIBERS  3-D NETWORK  IN SOME ORGANS

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36  MANY PACKED, THICK COLLAGENOUS FIBERS- ALIGNED  ELASTIC FIBERS- THIN NETWORK  FEW FIBROBLASTS  WITHSTANDS FORCES IN ONE DIRECTION- LIGAMENTS, TENDONS  POOR BLOOD SUPPLY

37  COLLAGENOUS FIBERS ARE THICKER AND MORE RANDOMLY ARRANGED  WITHSTAND FORCES EXERTED IN MANY DIFFERENT DIRECTIONS  DERMIS

38 YYELLOW ELASTIC FIBERS IN PARALLEL STRAND OR BRANCHING SSOME COLLAGENOUS FIBERS, AND FIBROBLASTS IIN HOLLOW ORGAN LAYERS, BETWEEN BONES OF SPINAL COLUMN

39  RIGID GROUND MATRIX  SUPPORT, FRAMEWORKS, ATTACHMENTS; PROTECTION; MODEL FOR BONE GROWTH  CHONDROCYTES IN LACUNAE  PERICHONDRION  NO BLOOD SUPPLY  3 TYPES

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41  MOST COMMON  FINE COLLAGENOUS FIBERS  ‘WHITE GLASS’  BONE ENDS, NOSE, RESPIRATORY RINGS, EMBRYONIC BONE  BONE GROWTH

42  MORE FLEXIBLE  DENSE NETWORK OF ELASTIC  FIBERS  EARS, LARYNX

43  TOUGH  MANY COLLAGENOUS FIBERS  SHOCK ABSORBER  INTERVERTOBRAL DISKS, KNEES

44 SSOLID GROUND MATRIX; COLLAGENOUS FIBERS MMINERAL SALTS FFRAMEWORK MMOVEMENT: LEVERS PPROTECTION FFORMS BLOOD CELLS SSTORES MINERALS: CALCIUM, PHOSPHORUS

45  OSTEOBLASTS: OSTEOCYTES  LAMALLAE  HAVERSIAN/CENTRAL CANALS  OSTEON  BLOOD SUPPLY: CENTRAL CANAL, CANALICULI

46  MATRIX: PLASMA  CELLS: RBC(TRANSPORT O 2 ), WBC(IMMUNITY), CELL FRAGMENTS: PLATELETS (CLOTTING)  HEMATOPOIETIC TISSUE

47  EPITHELIAL MEMBRANES: ◦ THIN EPITHELIAL LAYERS AND CONNECTIVE TISSUE  TYPES ◦ SEROUS MEMBRANES:  CAVITIES WITH NO OPENINGS  SIMPLE SQUAMOUS EPITHELIAL (MESOTHELIUM) & AREOLAR  SECRETE SEROUS FLUID: LUBRICATION

48 MMUCOUS MEMBRANES ◦C◦CAVITIES WITH OPENINGS TO OUTSIDE ◦E◦EPITHELIUM VARIES; AREOLAR ◦G◦GOBLET CELLS: MUCUS CCUTANEOUS MEMBRANE ◦S◦SKIN ◦I◦INTEGUMANTARY SYSTEM (CHAP 6)

49 SSYNOVIAL ◦L◦LINES JOINTS (CHAP 8) ◦S◦SYNOVIAL FLUID: LUBRICATION

50  CONTRACTILE: PULL ON ATTACHMENTS  ELONGATED CELLS: FIBERS  3 TYPES ◦ SKELETAL ◦ SMOOTH ◦ CARDIAC

51  USUALLY ATTACH TO BONE  USUALLY UNDER CONSCIOUS CONTROL ◦ VOLUNTARY  LONG: 40mm x 0.1 mm; MULTINUCLEATED  STRIATED: ACTIN AND MYOSIN FILAMENTS

52  HOLLOW ORGANS  UNCONSCIOUS CONTROL: INVOLUNTARY  SHORTER CELLS; SPINDLE SHAPED; CENTRAL NUCLEUS  LACKS STRIATIONS

53  ONLY IN HEART  STRIATED  3-D WITH INTERCALATED DISC; NETWORK  INVOLUNTARY

54 BBRAIN, SPINAL CORD, PERIPHERAL NERVES NNEURONS PPICK UP CHANGES IN ENVIRONMENT CCONNECT BY AXONS TO OTHER NERVES, MUSCLES OR GLANDS NNEUROGLIAL CELLS ◦S◦SUPPORT, BIND, PHAGOCYTOSIS, SUPPLY GROWTH FACTORS, SUPPLY NUTRIENTS, COMMUNICATION BETWEEN CELLS

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57  Know all the pictures of all the tissues  Know the characteristics of all the types of tissues  Know where you would find the different epithelial tissues and their functions  Know where you would find the different connective tissues and their functions  Know where you would find the different muscle tissue and their functions  Know the types of membranes; where you find them; functions


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