md0006 - BASIC HUMAN ANATOMY.pdf - Raems.com

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11-34. GENERAL Section XI. THE SPECIAL SENSE OF EQUILIBRIUM (BALANCE) a. Posture. Posture is the specific alinement of the body parts at any given time. Humans can assume an infinite variety of postures. However, the truly erect posture is unique to humans. b. Equilibrium. Equilibrium is the state of balance of the body. An erect standing human has a highly unstable equilibrium and therefore can easily fall. Through a variety of sensory inputs (visual, etc.) and postural reflexes, the body is maintained in its erect posture. c. Stimulus-Gravitational Forces. A primary sensory input for equilibrium consists of gravitational forces. This input is received by the membranous labyrinth within the internal ear. The gravitational forces are of two types: static, when the body is standing still, and kinetic, when the body is moving in either linear (straight) or angular directions. d. Membranous Labyrinth. The specific portions of the membranous labyrinth involved are the two sac-like structures--the sacculus and the utriculus. Each of these two structures has an area of special hair cells called the macula. In addition, there are three semicircular ducts located within the osseous semicircular canals of the temporal bone of the skull. Each semicircular duct has a crista, a little ridge of hair cells across the axis of the duct. e. "Body Sense." All of the various sensory inputs related to the maintenance of equilibrium and posture are integrated within the brain as "body sense." Correct information is sent to the muscles of the body by means of specific postural reflexes in order to maintain the proper posture. 11-35. SACCULUS AND UTRICULUS a. The sacculus and the utriculus are two sac-like portions of the membranous labyrinth. They are filled with endolymph. b. On the wall of each sac is a collection of special hair cells known as the macula, which serves as a receptor organ for static and linear kinetic gravitational forces. The saccular macula and the utricular macula are oriented at more or less right angles to each other. For the pair of maculae in the membranous labyrinth of the right side, there is a corresponding pair in the labyrinth of the left side. Information from all of these maculae is sent into the brain for continuous sensing of the position of the head in space. MD0006 11-35
11-36. SEMICIRCULAR DUCTS (FIGURE 11-15) Extending from and opening into the utriculus are three hollow structures called the semicircular ducts. Since the utriculus <strong>com</strong>pletes the circle for each duct, the ducts act as if they were <strong>com</strong>plete circles. Figure 11-15. Diagram of semicircular duct orientation. a. Orientation. Two of the ducts are vertically oriented (one anterior and one posterior). The third duct is essentially horizontal. The three ducts are all oriented at right angles to each other. In addition, the three ducts of one membranous labyrinth are matched or paired by the three ducts of the opposite membranous labyrinth. b. Ampullae and Cristae. Each semicircular duct ends with an enlargement where it opens into the utriculus. This enlargement or swelling is called an ampulla. The crista is at a right angle to the axis of the duct. Movement of the endolymph within the duct--caused by movement of the head in space--deforms (bends) the hairs of the crista in specific directions. These are responses to linear and/or angular kinetic gravitational forces. MD0006 11-36
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U. S. ARMY MEDICAL DEPARTMENT CENTE
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TABLE OF CONTENTS Lesson Paragraphs
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9 THE HUMAN CARDIOVASCULAR AND LYMP
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MD0006 v LIST OF ILLUSTRATIONS Figu
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MD0006 vii LIST OF TABLES Table Pag
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Material Furnished: In addition to
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LESSON ASSIGNMENT LESSON 1 Introduc
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terminology. Accountants have debit
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. Head and Neck. The brain, eyes, e
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Figure 1-2. Anatomical position and
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1-11. NAMES a. Names are chosen to
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d. Mitochondria (Plural). Mitochond
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5. What is a cell? 6. What is a tis
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15. In figure 1-6, three points are
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18. In figure 1-8, parts of a "typi
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14. a. Midsagittal or median plane.
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2-1. DEFINITION LESSON 2 TISSUES OF
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d. Functions. According to its loca
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. Types of Bone Tissues. There are
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Figure 2-4. A neuron. Figure 2-5. A
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8. Characteristic cells of fibrous
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SOLUTIONS TO EXERCISES, LESSON 2 1.
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LESSON ASSIGNMENT LESSON 3 The Huma
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3-2. COVERINGS OF THE HUMAN BODY Th
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3-6. GLANDS The types of glands inc
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3-13. BURSA a. A bursa (figure 3-3)
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EXERCISES, LESSON 3 REQUIREMENT. Th
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16. The term serous refers to a . S
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13. Sebaceous glands produce an oil
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MD0006 4-2 4-13. Describe the gener
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Section II. BONE AS AN INDIVIDUAL O
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4-5. DEVELOPMENT OF AN INDIVIDUAL B
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Example: The frontal bone. (The fro
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d. Capsule. The "typical" synovial
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(2) In the plane joint, the contact
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Figure 4-3B. Posterior view of the
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(d) The sacrum, which is a bony fus
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Figure 4-6. The human skull (front
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PART UPPER MEMBER LOWER MEMBER GIRD
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Figure 4-8. The human scapula and c
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Figure 4-10. The human hand. Figure
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Figure 4-13. The human foot. MD0006
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7. In the early fetus, bones are pr
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17. Name and define the two major s
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19. The regions of the vertebral co
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5-1. MUSCLE TISSUES LESSON 5 THE HU
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Figure 5-1. Skeletal and facial mus
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a. Trunk Musculature. The trunk mus
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. Sesamoid bones, such as the patel
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6-1. GENERAL LESSON 6 THE HUMAN DIG
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a. Teeth. Figure 6-2. Anatomy of th
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6-4. PHARYNX The pharynx (pronounce
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common bile duct. The common bile d
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14. The texture of the pancreas is
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10. The process of digestion is fac
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7-1. INTRODUCTION LESSON 7 THE HUMA
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SUBDIVISION FUNCTION (1) SUPRALARYN
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(2) Oropharynx. The portion of the
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Figure 7-4. Infralaryngeal structur
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7-8. DIAPHRAGMATIC (ABDOMINAL) BREA
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9. The functions of the supralaryng
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8-3. THE KIDNEY a. General. (1) The
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the cortex layer, it once again bec
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eginning of an embryo (the process
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(2) Wall structure. The inner linin
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Figure 8-5. The human male genital
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(1) Surrounding the urethra is a ce
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8. The first coiled portion of the
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21. The external genitalia of the h
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19. The inner lining of the uterus
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LESSON 9 THE HUMAN CARDIOVASCULAR A
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(1) Red blood cells (erythrocytes).
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(1) The arteries carry blood away f
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(3) Relationship of wall thickness
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ecome closed for whatever reason, t
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Figure 9-5. Main arteries of the hu
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Figure 9-6. Main veins of the human
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a. Lymphatic Capillaries. Lymphatic
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5. The most common types of white b
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18. In the case of collateral circu
Page 177 and 178: SOLUTIONS TO EXERCISES, LESSON 9 1.
Page 179 and 180: 15. The coronary arteries supply "n
Page 181 and 182: LESSON ASSIGNMENT LESSON 10 The Hum
Page 183 and 184: . The Endocrine System. In the huma
Page 185 and 186: e. Of the many hormones produced by
Page 187 and 188: hormones are involved in the mobili
Page 189 and 190: 5. The pituitary body is a small -s
Page 191 and 192: SOLUTIONS TO EXERCISES, LESSON 10 1
Page 193 and 194: 13. During the first half of the me
Page 195 and 196: MD0006 11-2 11-12. Define periphera
Page 197 and 198: 11-5. NEURON PROCESSES Figure 11-1.
Page 199 and 200: a. The Synapse. A synapse (figure 1
Page 201 and 202: system (ANS). The CNS is made up of
Page 203 and 204: Figure 11-5B. Human brain (bottom v
Page 205 and 206: d. Ventricles. Within the brain, th
Page 207 and 208: Figure 11-7. A schematic diagram of
Page 209 and 210: (1) Cranial nerves. The 12 pairs of
Page 211 and 212: (4) Visceral motor neurons of the A
Page 213 and 214: organ. The cell bodies of the secon
Page 215 and 216: (2) Motor pathways. A motor pathway
Page 217 and 218: 11-26. GENERAL Section IX. THE SPEC
Page 219 and 220: c. Internal Structures of the Eyeba
Page 221 and 222: (5) Iris. Another structure formed
Page 223 and 224: 11-30. GENERAL Section X. THE SPECI
Page 225 and 226: 11-33. THE INTERNAL EAR a. Labyrint
Page 227: Figure 11-14. Diagram of the scalae
Page 231 and 232: f. Cerebellum. The cerebellum has b
Page 233 and 234: 7. Each item below refers to the th
Page 235 and 236: 18. Groups of related functions are
Page 237 and 238: 30. If it carries information from
Page 239 and 240: 46. Name examples of general senses
Page 241 and 242: 61. The orbit is the cavity in the
Page 243 and 244: 73. The central column of the cochl
Page 245 and 246: SOLUTIONS TO EXERCISES, LESSON 11 1
Page 247 and 248: 19. The ventricles of the brain are
Page 249 and 250: 34. In the ANS, the number of neuro
Page 251 and 252: 52. The outermost layer of the eyeb
Page 253 and 254: ossicles are: malleus, incus, and s
Page 255: COMMENT SHEET SUBCOURSE MD0006 Basi
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