An Anatomical Study of the Nasal Superficial Musculoaponeurotic System
Superficial anatomy breaks the body into anatomical landmarks and regions Superficial anatomy breaks...
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Transcript of Superficial anatomy breaks the body into anatomical landmarks and regions Superficial anatomy breaks...
Superficial anatomy breaks the body Superficial anatomy breaks the body into anatomical landmarks and regionsinto anatomical landmarks and regions
Sectional anatomy provides directional Sectional anatomy provides directional referencesreferences
Anatomical position – Anatomical position – standing upright with standing upright with palms facing forwardpalms facing forward
Figure 1.8 Figure 1.8 Abdominopelvic Quadrants Abdominopelvic Quadrants
and Regionsand Regions
Figure 1.8a
Transverse plane divides the body into Transverse plane divides the body into superior and inferiorsuperior and inferior
Frontal (coronal) plane divides the body into Frontal (coronal) plane divides the body into anterior and posterioranterior and posterior
Sagittal plane divides the body into left and Sagittal plane divides the body into left and rightright Midsagittal divides the body exactly down the Midsagittal divides the body exactly down the
middlemiddle
Planes and Sections are Planes and Sections are important in visualizing important in visualizing
structuresstructures
Body cavities are internal chambers Body cavities are internal chambers holding vital organsholding vital organs Cavities protect vital organsCavities protect vital organs Cavities allow organs to change in shape Cavities allow organs to change in shape
and sizeand size Two body cavitiesTwo body cavities
Dorsal body cavity includes the cranial Dorsal body cavity includes the cranial cavity and the spinal cavitycavity and the spinal cavity
Ventral body cavity includes the thoracic Ventral body cavity includes the thoracic cavity and the abdominopelvic cavitycavity and the abdominopelvic cavity
Body CavitiesBody Cavities
The thoracic cavity contains the heart The thoracic cavity contains the heart and lungs.and lungs.
It is subdivided into the left and right It is subdivided into the left and right pleural cavities and the mediastinumpleural cavities and the mediastinum Each pleural cavity contains one lung Each pleural cavity contains one lung
lined by the visceral and parietal pleura lined by the visceral and parietal pleura The mediastinum contains the The mediastinum contains the
pericardium, another serous membrane pericardium, another serous membrane that surrounds the heartthat surrounds the heart
Thoracic CavitiesThoracic Cavities
Animation: Heart DissectionPLAY
The abdominopelvic cavity is lined by The abdominopelvic cavity is lined by the peritoneumthe peritoneum The abdominal cavity extends from the The abdominal cavity extends from the
diaphragm to the superior margins of the diaphragm to the superior margins of the pelvispelvis liver, stomach, spleen and most of the large liver, stomach, spleen and most of the large
intestineintestine
Abdominopelvic CavityAbdominopelvic Cavity
The pelvic cavity is bordered by the The pelvic cavity is bordered by the pelvis, with a floor of muscle pelvis, with a floor of muscle reproductive organs, urinary bladder and the reproductive organs, urinary bladder and the
final portion of the large intestinefinal portion of the large intestine
Abdominopelvic CavityAbdominopelvic Cavity
Animation: Digestive System DissectionPLAY
X-raysX-rays Computerized tomography (CT) scansComputerized tomography (CT) scans Magnetic resonance imaging (MRI) scansMagnetic resonance imaging (MRI) scans Ultrasound imagesUltrasound images Spiral CT scansSpiral CT scans Digital subtraction angiography images Digital subtraction angiography images
(DSA)(DSA) Positron emission tomography (PET) scansPositron emission tomography (PET) scans
Clinical technology allows Clinical technology allows many different views of the many different views of the
bodybody
The characteristics of life.The characteristics of life. The sciences of anatomy and physiology and The sciences of anatomy and physiology and
their various subdivisions.their various subdivisions. The levels of organization in the human body.The levels of organization in the human body. The definition and importance of homeostasis.The definition and importance of homeostasis. The terminology associated with superficial and The terminology associated with superficial and
sectional anatomy and the body cavities.sectional anatomy and the body cavities.
You should now be You should now be familiar with:familiar with:
Tissues are:Tissues are: Collections of specialized cells and cell Collections of specialized cells and cell
products organized to perform a limited products organized to perform a limited number of functionsnumber of functions Histology = study of tissuesHistology = study of tissues
The four tissue types are:The four tissue types are: EpithelialEpithelial ConnectiveConnective MuscularMuscular NervousNervous
Tissues and tissue typesTissues and tissue types
Includes glands and epitheliumIncludes glands and epithelium Glands are secretoryGlands are secretory
Is avascularIs avascular Forms a protective barrier that Forms a protective barrier that
regulates permeabilityregulates permeability Cells may show polarityCells may show polarity
Epithelial tissueEpithelial tissue
Physical protectionPhysical protection Control permeabilityControl permeability Provide sensationProvide sensation Produce specialized secretionsProduce specialized secretions
Functions of epitheliumFunctions of epithelium
Perform secretory functionsPerform secretory functions Perform transport functionsPerform transport functions Maintain physical integrityMaintain physical integrity Ciliated epithelia move materials Ciliated epithelia move materials
across their surfaceacross their surface
Specializations of Specializations of epitheliumepithelium
Cells attach via cell adhesion Cells attach via cell adhesion molecules (CAM)molecules (CAM)
Cells attach at specialized cell Cells attach at specialized cell junctionsjunctions Tight junctionsTight junctions DesmosomesDesmosomes Gap junctionsGap junctions
Maintaining the integrity Maintaining the integrity of epitheliumof epithelium
Basal lamina attaches to underlying Basal lamina attaches to underlying surfacesurface Lamina lucidaLamina lucida Lamina densaLamina densa
Germinative cells replace short-lived Germinative cells replace short-lived epithelial cellsepithelial cells
Structure of typical Structure of typical epitheliumepithelium
Number of cell layersNumber of cell layers SimpleSimple StratifiedStratified
Shape of apical surface cellsShape of apical surface cells SquamousSquamous CuboidalCuboidal ColumnarColumnar
Classification of epitheliaClassification of epithelia
Exocrine glandsExocrine glands Secrete through ducts onto the surface of Secrete through ducts onto the surface of
the glandthe gland Endocrine glandsEndocrine glands
Release hormones into surrounding fluidRelease hormones into surrounding fluid
Glandular epitheliaGlandular epithelia
Merocrine (product released through Merocrine (product released through exocytosis)exocytosis)
Apocrine (involves the loss of both Apocrine (involves the loss of both product and cytoplasm)product and cytoplasm)
Holocrine (destroys the cell)Holocrine (destroys the cell)
Glandular secretions can Glandular secretions can be:be:
UnicellularUnicellular Individual secretory cellsIndividual secretory cells
MulticellularMulticellular Organs containing glandular epitheliumOrgans containing glandular epithelium Classified according to structureClassified according to structure
GlandsGlands
Establishing a structural frameworkEstablishing a structural framework Transporting fluids and dissolved materialsTransporting fluids and dissolved materials Protecting delicate organsProtecting delicate organs Supporting, surrounding and interconnecting tissuesSupporting, surrounding and interconnecting tissues Storing energy reservesStoring energy reserves Defending the body from microorganismsDefending the body from microorganisms
Connective tissue Connective tissue functions: functions:
Specialized cellsSpecialized cells MatrixMatrix
Composed of extracellular protein fibers and a Composed of extracellular protein fibers and a ground substanceground substance
Connective tissues Connective tissues contain contain
Contains varied cell populationsContains varied cell populations Contains various fiber typesContains various fiber types A syrupy ground substanceA syrupy ground substance
Connective tissue proper Connective tissue proper
Fluid connective tissueFluid connective tissue
Contains a distinctive cell populationContains a distinctive cell population Watery ground substance with Watery ground substance with
dissolved proteinsdissolved proteins Two typesTwo types
BloodBlood LymphLymph
Less diverse cell populationLess diverse cell population Dense ground substanceDense ground substance Closely packed fibersClosely packed fibers Two typesTwo types
CartilageCartilage BoneBone
Supporting connective Supporting connective tissuestissues
Contains fibers, a viscous ground substance, and a Contains fibers, a viscous ground substance, and a varied cell population.varied cell population.
The ground substance is the non-living material in The ground substance is the non-living material in which the cells and protein fibres are found.which the cells and protein fibres are found. Can contain varying amounts of water.Can contain varying amounts of water. Can be of viscous (blood), semi-solid (cartilage) Can be of viscous (blood), semi-solid (cartilage)
or solid (bone).or solid (bone).
The ground substance and the extracellular The ground substance and the extracellular proteins form the matrix.proteins form the matrix.
Connective tissue properConnective tissue proper
Types of cells found in connective Types of cells found in connective tissue:tissue: MacrophageMacrophage AdipocytesAdipocytes Mesenchymal cellsMesenchymal cells FibroblastsFibroblasts MelanocytesMelanocytes Mast cellsMast cells LymphocytesLymphocytes MicrophagesMicrophages
Three types of fiberThree types of fiber Collagen fibersCollagen fibers Reticular fibersReticular fibers Elastic fibersElastic fibers
Connective tissue properConnective tissue proper
Classified as loose or denseClassified as loose or dense LooseLoose
Embryonic mesenchyme, mucous Embryonic mesenchyme, mucous connective tissues connective tissues
Areolar tissueAreolar tissue Adipose tissueAdipose tissue Reticular tissueReticular tissue
DenseDense Dense regular CTDense regular CT Dense irregular CTDense irregular CT
Connective tissue properConnective tissue proper
Distinctive collections of cells in a Distinctive collections of cells in a fluid matrixfluid matrix
BloodBlood Formed elements and plasmaFormed elements and plasma
Red blood cells, white blood cells and plateletsRed blood cells, white blood cells and platelets Arteries carry blood away, veins carry to Arteries carry blood away, veins carry to
the heartthe heart Capillaries allow diffusion into the Capillaries allow diffusion into the
interstitial fluid interstitial fluid LymphLymph
Interstitial fluid entering the lymphatic Interstitial fluid entering the lymphatic vesselsvessels
Fluid connective tissuesFluid connective tissues
Cartilage and bone support the rest of Cartilage and bone support the rest of the bodythe body
CartilageCartilage Grows via interstitial and appositional Grows via interstitial and appositional
growthgrowth Matrix is a firm gel containing chondroitin Matrix is a firm gel containing chondroitin
sulfatesulfate Cells called chondrocytesCells called chondrocytes Cells found in lacunaeCells found in lacunae Perichondrium separates cartilage from Perichondrium separates cartilage from
surrounding tissuessurrounding tissues Three types: hyaline, elastic and Three types: hyaline, elastic and
fibrocartilagefibrocartilage
Supporting connective Supporting connective tissuestissues
Has osteocytesHas osteocytes Depend on diffusion through canaliculi Depend on diffusion through canaliculi
for nutrientsfor nutrients Little ground substanceLittle ground substance Dense mineralized matrixDense mineralized matrix Surrounded by periosteumSurrounded by periosteum
Bone, or osseus tissueBone, or osseus tissue
Form a barrierForm a barrier Composed of epithelium and Composed of epithelium and
connective tissueconnective tissue Four typesFour types
CutaneousCutaneous SynovialSynovial SerousSerous MucousMucous
Membranes are simple Membranes are simple organsorgans
Line cavities that communicate with Line cavities that communicate with the exteriorthe exterior
Contain lamina propriaContain lamina propria
Mucous membranesMucous membranes
Line sealed internal cavitiesLine sealed internal cavities Form transudateForm transudate
Serous membranesSerous membranes
Cutaneous membraneCutaneous membrane Covers the body surfaceCovers the body surface
Synovial membraneSynovial membrane Incomplete lining within joint cavitiesIncomplete lining within joint cavities
Network of connective tissue proper Network of connective tissue proper consisting ofconsisting of Superficial fasciaSuperficial fascia Deep fasciaDeep fascia Subserous fasciaSubserous fascia
Organs and systems are Organs and systems are interconnectedinterconnected
Specialized for contractionSpecialized for contraction Three typesThree types
SkeletalSkeletal CardiacCardiac SmoothSmooth
Muscle tissueMuscle tissue
Cells are multinucleateCells are multinucleate Striated voluntary muscleStriated voluntary muscle Divides via satellite cellsDivides via satellite cells
Skeletal muscleSkeletal muscle
Cardiocytes occur only in the heartCardiocytes occur only in the heart Striated involuntary muscleStriated involuntary muscle Relies on pacemaker cells for regular Relies on pacemaker cells for regular
contractioncontraction
Cardiac muscleCardiac muscle
Non-striated involuntary muscleNon-striated involuntary muscle Can divide and regenerateCan divide and regenerate
Smooth muscle tissueSmooth muscle tissue
Conducts electrical impulsesConducts electrical impulses Conveys information from one area to Conveys information from one area to
anotheranother
Neural tissueNeural tissue
NeuronsNeurons Transmit informationTransmit information
NeurogliaNeuroglia Support neural tissueSupport neural tissue Help supply nutrients to neuronsHelp supply nutrients to neurons
Neural tissue cellsNeural tissue cells
Cell bodyCell body DendritesDendrites Axon (nerve fiber)Axon (nerve fiber)
Carries information to other neuronsCarries information to other neurons
Neural anatomyNeural anatomy
Injured tissues respond in Injured tissues respond in coordinated fashioncoordinated fashion
Homeostasis restored by Homeostasis restored by inflammation and regenerationinflammation and regeneration
Inflammation and Inflammation and regenerationregeneration
Isolates injured areaIsolates injured area Damaged cells, tissue components and Damaged cells, tissue components and
dangerous microorganisms removeddangerous microorganisms removed Infection avoidedInfection avoided
Regeneration restores normal functionRegeneration restores normal function
Inflammatory responseInflammatory response
Change with ageChange with age Repair and maintenance less efficientRepair and maintenance less efficient Structure alteredStructure altered Chemical composition alteredChemical composition altered
Aging and tissue repairAging and tissue repair
Aging and cancer Aging and cancer incidenceincidence
Incidence of cancer increases with Incidence of cancer increases with ageage
70-80% of all cases due to exposure 70-80% of all cases due to exposure to chemicals or environmental to chemicals or environmental factorsfactors