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Introduction to the Human Body
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Introduction Anatomy and Physiology show the relationship between structure and function
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Introduction Key to learning anatomy is understanding function
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Introduction For example: Left side of heart is larger than right. Why is that?
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Gross Anatomy Structures large enough that one can see with the unaided eye
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Gross Anatomy 1.Surface Anatomy 2.Regional Anatomy 3.Systemic Anatomy 4.Developmental Anatomy
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Surface Anatomy Study of superficial markings For example: Elbow- olecrenon process
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Regional Anatomy The study of specific areas of the body
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Systemic Anatomy Study of specific organ systems 11 systems
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Developmental Anatomy The study of how anatomical structures change throughout the course of development
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11 Systems 1.Integumentary* 2.Nervous* 3.Skeletal* 4.Endocrine 5.Muscular* 6.Cardiovascular 7.Lymphatic 8.Urinary 9.Respiratory 10.Reproductive 11.Digestive
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Microscopic Anatomy Involves studying anatomical structures that cannot be seen with the unaided eye
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Microscopic Anatomy 1.Cytology 2.Histology
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Cytology Study of cells
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Histology Study of tissue
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Physiology-Function 1.Cell Physiology 2.Special Physiology 3.Systemic Physiology 4.Pathological Physiology
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Cell Physiology Study of cells
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Special Physiology Study of specific organs
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Systemic Physiology Study of specific systems
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Pathological Physiology Study of how disease effects organs or organ systems
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Anatomical Organization We will start from the smallest and finish with the largest
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1. Chemical or Molecular Level Atoms form molecules
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2. Cellular Level Smallest living units in organisms In fact some organisms are made up of a single cell Cells contain organelles Each organelle has a function
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3. Tissue level Different groups of cells that perform a function
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4. Organ Level Different types of tissues that perform a function
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5. Organ System Level Consists of different organs working together
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Organism Level All systems working together (humans)
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Homeostasis Stability
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Homeostasis Our body has developed ways that make sure that our body adjusts to changing conditions
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Homeostasis Our body does this via two methods
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1. Autoregulation This occurs when our body adjusts itself to a changing environmental condition
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1. Autoregulation Example: High altitudes have less O2 Blood produces more hemoglobin
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2. Extrinsic Regulation This is when the nervous and endocrine system acts on other systems
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Negative Feedback The effector decreases the change the receptor noted
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Positive Feedback The effector increases the change the receptor noted
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Anatomical Position Supine Prone
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Abdominopelvic quadrants 4 Intersect at the navel
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Abdominopelvic quadrants 1.RUQ Right upper quadrant 2.LUQ Left upper quadrant 3.RLQ Right lower quadrant 4.LLQ Left lower quadrant
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Abdominopelvic Region More specific 9
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Abdominopelvic Region 1.Right hypochondriac 2.Left hypochondriac 3.Right lumbar 4.Left lumbar 5.Right inguinal 6.Left inguinal 7.Epigastric 8.Umbilical 9.Hypogastric (pubic)
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Terms Anterior or Ventral
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Terms Posterior or dorsal
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Terms Cranial - head
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Terms Caudal - tail
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Terms Superior – higher level
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Terms Inferior – lower level
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Terms Proximal – away from fingers and toes
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Terms Distal – toward fingers and toes
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Terms Medial
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Terms Lateral
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Planes Sometimes to gain a greater understanding of 3D images anatomists cut the image at different planes
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Frontal Plane Anterior/Posterior
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Sagittal Plane Left/Right
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Tranverse Plane Superior/Inferior
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Cavities Organs are contained in cavities
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Dorsal Body Cavity 1.Cranial Cavity 2.Spinal Cavity
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Ventral Body Cavity A. Thoracic Cavity Pleura Cavity Pericardial Cavity B.Abdominopelvic (peritoneal) Cavity 1.Abdominal cavity 2.Pelvic cavity
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Ventral Body Cavity Diaphragm separates the thoracic and abdominopelvic cavities
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Membranes Visceral pericardium Parietal pericardium Visceral pleural Parietal pleural Parietal peritoneum Visceral peritoneum
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