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Anatomy & Physiology An Overview. Science- attempt to understand nature in a rational, logical...
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Anatomy Anatomy & &
PhysiologPhysiologyy
An An OverviewOverview
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Science- Science- attempt to attempt to understand nature in a understand nature in a rational, logical mannerrational, logical manner
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ProblemProblem
HypothesisHypothesis
ExperimentExperiment
Collect/Analyze Collect/Analyze DataData
Form a ConclusionForm a Conclusion
Scientific MethodScientific Method
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Theory-Theory- repeatable repeatable experiments that verify experiments that verify hypothesishypothesis
LawLaw- theories with - theories with unusually high level of unusually high level of confidenceconfidence
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AnatomyAnatomy
ana- “up”ana- “up”temos/tomas- “cutting”temos/tomas- “cutting”Def. -study of body Def. -study of body
structurestructure
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Divisions of AntomyDivisions of Antomy
Gross AnatomyGross Anatomy – observation of – observation of large anatomical structures visible large anatomical structures visible to the naked eye to the naked eye
Microscopic AnatomyMicroscopic Anatomy – study of cells – study of cells (cytology) & tissues (histology)(cytology) & tissues (histology)
Radiological AnatomyRadiological Anatomy – noninvasive – noninvasive method of looking inside body –X-method of looking inside body –X-rays, Cat scans, MRI’s , PET scans, rays, Cat scans, MRI’s , PET scans, etcetc
Systemic AnatomySystemic Anatomy - study body by - study body by systemssystems
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physisphysis- “nature”- “nature”LogosLogos- “science/study”- “science/study”Def.- body function; how Def.- body function; how body parts support lifebody parts support life
PhysiologyPhysiology
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Divisions of PhysiologyDivisions of Physiology
Type of organism (human/plant)Type of organism (human/plant) Organizational level Organizational level
(molecular/cellular)(molecular/cellular) Specific/systemic Specific/systemic
(neurophysiology, respiratory (neurophysiology, respiratory physiology)physiology)
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Characteristics of LifeCharacteristics of Life
MovementMovement – chg in position; – chg in position; motionmotion
ResponsivenessResponsiveness – reaction to a – reaction to a stimulus (chg) in/outside the bodystimulus (chg) in/outside the body
Growth/developmentGrowth/development – increase in – increase in body sizebody size
ReproductionReproduction – new organisms/new – new organisms/new cellscells
RespirationRespiration – obtain O – obtain O22, remove , remove COCO22, rls energy from food, rls energy from food
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Characteristics of LifeCharacteristics of Life DigestionDigestion – breakdown of food into – breakdown of food into
absorbable sizesabsorbable sizes AbsorptionAbsorption – passage of – passage of
substances through membranes & substances through membranes & into body fluidsinto body fluids
CirculationCirculation – mvmt of substances – mvmt of substances in body fluidsin body fluids
AssimilationAssimilation – chg of absorbed – chg of absorbed substances into diff chem formssubstances into diff chem forms
ExcretionExcretion – removal of wastes – removal of wastes produced through metabolismproduced through metabolism
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Requirements for Requirements for LifeLife
WaterWater– Most abundant substance in Most abundant substance in
bodybody– Req’d for metabolic processesReq’d for metabolic processes– Req’d for transport of Req’d for transport of
substancessubstances– Regulates body tempRegulates body temp
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FoodFood– Provides necessary nutrientsProvides necessary nutrients– Supplies energySupplies energy– Supplies raw materials for Supplies raw materials for
production of necessary production of necessary substances/regulation of vital substances/regulation of vital reactionsreactions
Requirements for Requirements for LifeLife
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OxygenOxygen– 1/5 of air1/5 of air– Used to rls energy from foodUsed to rls energy from food
Requirements for Requirements for LifeLife
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HeatHeat– Form of energyForm of energy– Helps regulate rates of metabolic Helps regulate rates of metabolic
rxnsrxns
Requirements for Requirements for LifeLife
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PressurePressure– application of force on an objectapplication of force on an object
- - atmospheric pressure – atmospheric pressure – important for important for
breathingbreathing
- hydrostatic pressure – keeps blood - hydrostatic pressure – keeps blood flowingflowing
Requirements for Requirements for LifeLife
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Levels of Levels of OrganizationOrganization
CellularCellularTissueTissueOrganOrganOrgan systemOrgan systemOrganismOrganism
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Anatomical Anatomical TerminologTerminolog
yyAnatomical Position – standing erect, facing forward, upper limbs at the sides, palms facing forward and thumbs out
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Bilateral Bilateral Symmetry- rt Symmetry- rt & l sides of & l sides of body are body are mirror images; mirror images; one plane one plane divides body divides body into rt & l sidesinto rt & l sides
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IpsilateralIpsilateral – same side (rt lung – same side (rt lung & rt kidney)& rt kidney)
ContralateralContralateral – opposite side – opposite side ProximalProximal – closer to the torso – closer to the torso DistalDistal – farther from the torso – farther from the torso SuperficialSuperficial – near surface (also – near surface (also
peripheral)peripheral) DeepDeep – more internal – more internal InternalInternal - inside - inside External External - outside- outside
Positional TermsPositional Terms
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Body CavitiesBody Cavities
Ventral- Ventral- –Thoracic/ChestThoracic/Chest– heart – heart & lungs; rt/l pleural & & lungs; rt/l pleural & mediastinummediastinum
–AbdominopelvicAbdominopelvic– – “guts”“guts”Abdominal (upper)Abdominal (upper)Pelvic (lower) Pelvic (lower)
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Thoracic & Abdominal Thoracic & Abdominal Serous MembranesSerous Membranes
• Visceral layer – covers an organ• Parietal layer – lines a cavity or body wall
Thoracic Membranes• Visceral pleura• Parietal pleura• Visceral pericardium• Parietal pericardium
Abdominopelvic Membranes• Parietal peritoneum• Visceral peritoneum• Parietal perineum• Visceral perineum
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Thoracic Serous Membranes
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Abdominal Serous Membranes
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Dorsal-Dorsal-Cranial- in skull; Cranial- in skull; brainbrain
Spinal- spinal Spinal- spinal column; spinal column; spinal cordcord
Body CavitiesBody Cavities
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Righthypochondriacregion
Epigastricregion
Lefthypochondriacregion
Rightlumbarregion Umbilical
region
Leftlumbarregion
Rightiliacregion
Hypogastricregion
Leftiliacregion
Regions (9)
Abdominal Regions
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Right upperquadrant (RUQ)
Left upperquadrant (LUQ)
Right lowerquadrant (RLQ)
Left lowerquadrant (LLQ)
Quadrants (4)
Abdominopelvic Quadrants
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Body Terms p. 14
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Body Planes & SectionsBody Planes & Sections
SagittalSagittal (“arrow”)– any (“arrow”)– any plane that cuts body into rt plane that cuts body into rt & l sides& l sides–MidsagittalMidsagittal – plane that – plane that divides equallydivides equally
–ParasagittalParasagittal – plane that – plane that divides unequallydivides unequally
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Midsaggital
Parasaggital
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TransverseTransverse – horizontal – horizontal plane that cuts into plane that cuts into upper & lower portionsupper & lower portions
FrontalFrontal ( (CoronalCoronal)– )– vertical plane that cuts vertical plane that cuts into front & back into front & back sectionssections
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Transverse
Coronal (Frontal)
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Directional TermsDirectional TermsSuperiorSuperior – “above”; twd head – “above”; twd head InferiorInferior – “below”; twd feet – “below”; twd feet AnteriorAnterior (ventral on 2 legs)– (ventral on 2 legs)–
twd fronttwd front PosteriorPosterior (dorsal on 2 legs)– (dorsal on 2 legs)–
twd backtwd back MedialMedial – twd midline – twd midline LateralLateral – twd sides – twd sides ProximalProximal – closer to torso – closer to torso DistalDistal – farther from torso – farther from torso
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1)Superior
2)Inferior
3)Medial
4)Lateral
5)Proximal
6)Distal
7)Cranial
8)Caudal
12) Palmar
13) plantar
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Want some practice on Want some practice on directional terms and directional terms and such?……such?……
http://www.wiley.com/legacy/college/bio/tortora366927/resources/student/anatomydrill/ch1.html
http://www.proprofs.com/flashcards/story.php?title=directional-terms-anatomy-lab
http://bio-alive.com/tutorials/anatomy.htm
http://www.medtrng.com/quia.htm
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HomeostasisHomeostasis Maintaining constant internal conditionsMaintaining constant internal conditions
– Ex. Blood pH, body tempEx. Blood pH, body temp
•Homeostatic Control Mechanisms – monitors aspects of the internal environment & corrects as needed. Variations are within limits.
•There are three (3) parts:•Receptor •Control Center•Effector
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Structure of Feedback Structure of Feedback LoopLoop
ReceptorReceptor = = senses change; senses change; provides info about change to provides info about change to control centercontrol center
Control Center/IntegratorControl Center/Integrator = = control center that responds;control center that responds; tells tells what a particular value should be what a particular value should be (called the set point)(called the set point)
EffectorEffector = = structures that restore structures that restore homeostasis; elicits responses that homeostasis; elicits responses that change conditions in the internal change conditions in the internal environmentenvironment
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Homeostatic Control Homeostatic Control MechanismsMechanisms
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Type 1:Type 1:– Negative Feedback MechanismNegative Feedback Mechanism
Homeostatic Control Homeostatic Control MechanismsMechanisms
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Negative Feedback, Set Negative Feedback, Set PointPoint
Room temperature does not stay at Room temperature does not stay at set point of 68 degrees -- it only set point of 68 degrees -- it only averages 68 degreesaverages 68 degrees
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Human ThermoregulationHuman Thermoregulation Brain senses change Brain senses change
in blood in blood temperaturetemperature– if if overheatingoverheating, ,
vessels vessels dilatedilate in in the skin & the skin & sweating beginssweating begins
– if too if too coldcold, , vasoconstrictionvasoconstriction in in the skin & the skin & shivering beginsshivering begins
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Negative feedback summary:
• Prevents sudden, severe changes in body
• Reduces the actions of the effectors
• Corrects the set point
• Causes opposite of bodily disruption to occur, i.e. the ‘negative’
• Limits chaos in the body by creating stability
• Most common type of feedback loop
• Examples: body temperature, blood pressure & glucose regulation
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Type 2:Type 2:– Positive FeedbackPositive Feedback
• Self-amplifying change– leads to change in the same
direction• Normal way of producing rapid
changes – occurs with childbirth, blood clotting, protein digestion,
& generation of nerve signals
Homeostatic Control Homeostatic Control MechanismsMechanisms
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Positive feedback summary:
• Increases (accelerates) actions of body
• Produces more instability in body
• Produces more chaos in body
• There are only a few types necessary for our survival
• Positive feedback mechanisms are short-lived
• Controls only infrequent events that do not require continuous adjustments
• Considered to be the uncommon loop
• Examples: blood clotting & child birth
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Life-Threatening Life-Threatening FeverFever
Temperature > 108 degrees FTemperature > 108 degrees F– increases metabolic rateincreases metabolic rate– body produces heat even body produces heat even
fasterfaster Cycle continues to reinforce Cycle continues to reinforce
itselfitself Becomes fatal at 113 degrees FBecomes fatal at 113 degrees F
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Animation:Animation:Positive and Negative Positive and Negative
FeedbackFeedback
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