anatomy and physiology structure and function mary beth vogel, bsn, rn-c
TRANSCRIPT
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Anatomy and PhysiologyStructure and Function
Mary Beth Vogel, BSN, RN-C
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Useless Facts:
• There are at least 200 different types of cells in the human body
• 11% of the world is left-handed • 50% of a human’s bones are in the
hands/feet • A cough releases an explosive charge of air
that moves at speeds up to 60 mph • A human being loses an average of 40 to
100 strands of hair a day
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• Anatomy
• Gross vs Microscopic
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• Comparative anatomy
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• Physiology
• Pathology or Pathophysiology
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Structural Levels of Organization
• Least to most complex:
• A. Chemical
• B. Cellular
• C. Tissue
• D. Organ
• E. Systems
• F. Body
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Levels of Organization
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Systems
• Organs arranged to perform complex functions
• Can you name all of the systems?
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Levels of Organization
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• Integumentary• Nervous• Skeletal• Endocrine • Muscular• Cardiovascular• Lymphatic• Urinary• Respiratory• Digestive• Reproductive• Sensory (12th in some texts)
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Anatomical Position• Reference position
• Variations:
• Supine
• Prone
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Directional Terminology
• Reference points• Anterior• Posterior• Superficial• Deep• Proximal• Distal
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• Superior
• Inferior
• Medial
• Lateral
• Why are these important in health care?
• Can you put a directional term in a patient related/clinical sentence?
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Directional References
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Planes
• A. Transverse
• B. Frontal (coronal)
• C. Sagittal / Midsagittal
• What careers use plane
terminology?
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Planes
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Body Cavities• Internal spaces that hold organs
• What is the function of a cavity?
• Two major:
• Dorsal
• Ventral
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Body Cavities
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Dorsal Cavity
• 1. Cranial cavity
• 2. Spinal cavity
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Ventral Cavity
• 1. Thoracic cavity
• R&L pleural cav: lungs
• Mediastinum: hrt/pericardial cav, trachea, major vess
• 2. Abdominopelvic cavity
• Abdominal cav: dig organs
• Pelvic cav: dig/rep/urin organs
• 1 & 2 sep by diaphragm
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Review!
A:
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B:
B:
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Check your answers!
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Membranes• Serous memb: covers viscera and lines
thoracic + abdominopel cav
• 2 types:
• 1. Parietal – lines cavity
• 2. Visceral – covers organs
• Also named by cavity location:
• 1. Pleural: thoracic cav
• 2. Peritoneum: abd cavity
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• Parietal pleura
• Visceral pleura
• Parietal peritoneum
• Visceral peritoneum
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Quadrants
• Abdominopelvic area divided into 4:
• RUQ, LUQ, RLQ, LLQ
• Reference pt
• Major organs in each?
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Abdominopelvic Quadrants
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Abdominopelvic Regions
• 9 total:
• Upper: R & L hypochondriac, epigastric
• Middle: R & L lumbar, umbilical
• Lower: R & L iliac/inguinal, hypogastric
• What abdominopelvic region is located in all 4 quadrants?
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Body Regions Terminology• Why is this vocabulary important in health
care?• Antecubital• Axillary• Antebrachial• Brachial• Buccal• Carpal• Cephalic• Cervical• Cranial/cranium
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• Cutaneous• Cubital• Deltoid• Digital• Dorsal• Facial: nasal, orbital/opthalmic, oral,
frontal, zygomatic• Femoral• Gastric• Gluteal• Hepatic
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• Inguinal• Lumbar• Mammary• Occipital• Olecranal• Patellar• Pedal• Pelvic• Perineal• Plantar• Popliteal
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• Pectoral• Supraclavicular• Tarsal• Temporal• Thoracic• Umbilical• Volar
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Body divisions
• Axial
• Appendicular
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Technology allows a view
• X-rays
• Computerized tomography (CT) scans
• Ultrasound images
• Magnetic resonance imaging (MRI) scans
• Single-photon emission computed tomography (SPECT)
• Positron emission tomography (PET) scans
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X-ray
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Ultrasound
Uses high frequency sound waves to create an image of some part of the inside of the body
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CT/CAT
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MRI
A strong magnetic field is created by passing an electric current through the wire loops. While this is happening, other coils in the magnet send and receive radio waves. This triggers protons in the body to align themselves. Once aligned, radio waves are absorbed by the protons, which stimulate spinning. Energy is released after "exciting" the molecules, which in turn emits energy signals that are picked up by the coil. This information is then sent to a computer which processes all the signals and generates it into an image. The final product is a 3-D image representation of the area
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PET Scan
PET: detects pairs of gamma rays which are emitted indirectly by a tracer (positron-emitting radionuclide) which is placed in the body on a biologically active molecule. The images are reconstructed by computer analysis
Detects energy emitted by positively-charge particles (positrons). As the radiotracer is broken down inside the patient's body positrons are made. This energy appears as a 3-dimensional image on a computer monitor.
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Homeostasis
•
• State of relative constancy/equilibrium
• Adaptive responses; stabilize internal env
• Malfunction = disease
• Less efficient in geri/peds
• Maintains: vital signs, fl/elec bal, hormones, O2-CO2, bld gl/pH…
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• Feedback Loops
• 3 parts:
• Sensor
• Control Center
• Effector
• Types:
• Neg or Pos
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Negative Feedback Loop
• Common
• Opposes/negates a change
• Reversal of conditions
• Temp, bld gluc, exercise & O2, fl bal
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Negative Feedback: The Control of Body Temperature
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Positive Feedback Loop
• Uncommon
• Amplifies/reinforces a change
• Stimulatory until an event occurs to stop
• Blood clotting, labor
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Positive Feedback: Blood Clotting
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• This is the last slide of the first chapter we’ll cover this year!
• HOORAY!
• Last slides will become your favorite…
• …especially with PPTs that have more than 100 slides