Chapter 1 IntroAnatPhys - Chapter 1 Anatomy and Physiology...

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Chapter 1: Anatomy and Physiology Anatomy Physiology Structure (Morphology) Function(Working of…) of the Human Body Levels of Cellular Organization – ATOM CELL(Organelles) TISSUE ORGANS ORGAN SYSTEMS ORGANISM
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1.Movement 6. Digestion 2. Responsiveness 7. Absorption 3. Growth 8. Circulation 4. Reproduction 9. Assimulation 5.Respiration 10. Excretion CHARACTERISTICS OF LIFE (Table 1:1.Page 5)
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Maintenance of Life Processes What do we need to maintain the Characteristics of Life? 1. Water 2. Food 3. Oxygen 4. Heat (Temperature) 5. Pressure (Atmospheric and Hydrostatic) WHY? HOMEOSTASIS
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HOMEOSTASIS What is Homeostasis? (Page 7, Fig 1.6) Balance : external environment internal environment (Stability) HOMEOSTASIS How does the body adjust? STIMULI RECEPTORS “COLD TEMPERATURE” 98.6’F SET POINT 90’F RESPONSE - increases metabolism temperature increases to 98.6’F EFFECTORS
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NEGATIVE FEEDBACK SYSTEM MEASURES DEVIATIONS FROM THE NORMAL VALUES AND COMPENSATES (MAKES CORRECTIONS) Body Temperature Blood Pressure Blood Sugar Hormones Levels Back-up for Physiological Systems – “Normal Range” Positive FeedBack System Reacts on a stimulus - sucking reflex uterine contractions during labor blood clotting Positive feedback moves the physiology away from the normal condition but is usually “short-lived.”
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BODY ORGANIZATION Body Cavities The human body is divided into two major parts 1.AXIAL : Head Neck Trunk 2.APPENDICULAR : Upper and LOWER Limbs (arms) (legs)
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