chapter 1: introduction to the human bodymail.faribault.k12.mn.us/~laura_childs/s01b3e075.0/chapter...
TRANSCRIPT
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Chapter 1: Introduction to the
Human Body
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• Anatomy- to “dissect” for study – Structure w/function/organization/development
– Surface anat/anatomical imaging: diagnose disease
• X-ray, MRI
Human spinal cord dissection
by first-year medical student.
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• Physiology- processes
– Response to stimulus = homeostasis (balance)
Hemoglobin Gaseous Exchange
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• Structural & Functional Organization
– Chemical makeup - determines characteristics
– Cell - basic life unit
– Tissue - cells w/similar structure/function
• epithelial, connective, muscle, nervous
– Organ - 2 or > tissues (skin)
– Organ System (11)- organ groups w/common functn
– Organism- living (single to multicelled)
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The Human Body: Systems Working Together
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• Characteristics of Life
– Organization - parts relate/interact
– Metabolism – E production
– Responsiveness - adjust to stimuli
– Growth - increase in cell size (musc) & #
– Differentiation - general to specialized cells
– Reproduction - new cells/organism
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• Homeostasis
– Maintaining normal range around set point
w/changing variables/conditions
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• Negative Feedback
– Regulates “normal range”
– Receptors/control center/effecter ->opposite affect
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• Positive Feedback
– Increases deviation
– Harmful (seek medical care)
– Rare (childbirth)
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• Terminology/Body Plan (etymology)
– Directional (anatomical position)
• Anterior/Post, Dorsal/Vent, Superior/Inf, Cranial/Caud,
Medial/Lat, Proximal/Dist, Superficial/Deep
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– Body Parts
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– Regions (9)/quadrants (4)
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– Planes
• Sagittal (r/l, m/l), traverse (s/i), coronal/frontal (a/p),
• Sectional - interior (long/cs/ob)
(Longitudinal) Long axis
(Cross section) Rt angle to long
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– Cavities- thoracic(mediastinum), abdominal, pelvic
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• Serous Membranes- parietal/fluid/visceral
– Thoracic cavity- pericardium, pleura (2)
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– Abdominopelvic cavity
• Peritoneum (w/mesentery anchor/BV, nerves)
• Retroperitoneal (parietal only) – behind/w/body wall
– Kidneys, pancreas, bladder
Retroperitoneal Organs
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