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(1) Intima. The lumen (hollow central cavity) is lined by a layer of smooth epithelium known as the intima. (2) Media. A middle layer of smooth muscle tissue is called the media. (3) Adventitia. The adventitia is the outer layer of fibrous connective tissue that holds everything together. b. Types of Blood Vessels. See figure 9-1 for a diagram of the human circulatory system. We recognize three types of blood vessels: Figure 9-1. Scheme of blood vessels. MD0006 9-6
(1) The arteries carry blood away from the chambers of the heart. (2) The veins carry blood to the chambers of the heart. (3) Capillaries are extremely thin-walled vessels having only the intimal layer through which exchanges can take place between the blood and the tissue cells. c. Relationships. Arteries and veins are largest where they are closest to the heart. Away from the heart, they branch into smaller and smaller and more numerous vessels. The branching continues until the smallest arteries (arterioles) empty into the capillaries. The capillaries in turn are drained by the venules of the venous system. d. Valves. Within the heart and the veins are structures known as valves. Valves function to insure that the blood flows in only one direction. 9-7. THE HEART Through the action of its very muscular walls, the heart produces the primary motive force to drive the blood through the arterial system. In humans, the heart is located just above the diaphragm, in the middle of the thorax, and extending slightly to the left. It is said that the heart of an average individual is about the size of that individual's clenched fist. a. General Construction of the Human Heart. See figure 9-2 for an illustration of the human heart. (1) Chambers. The heart is divided into four cavities known as the chambers. The upper two chambers are known as the atria, right and left. Each atrium has an ear-like projection known as an auricle. The lower two chambers are known as ventricles, right and left. Between the two atria is a <strong>com</strong>mon wall known as the interatrial septum. Between the two ventricles is a <strong>com</strong>mon wall known as the interventricular septum. ATRIUM = hall AURICLE = ear-like flap VENTER = belly SEPTUM = fence (2) Wall layers. The walls of the chambers are in three general layers. Lining the cavity of each chamber is a smooth epithelium known as the endocardium. (Endocarditis is an inflammation of the endocardium.) The middle layer is made up of cardiac muscle tissue and is known as the myocardium. The outer layer of the heart is another epithelium known as the epicardium. MD0006 9-7
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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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EXERCISES, LESSON 5 REQUIREMENT. Th
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6-1. GENERAL LESSON 6 THE HUMAN DIG
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a. Teeth. Figure 6-2. Anatomy of th
Page 109 and 110: 6-4. PHARYNX The pharynx (pronounce
Page 111 and 112: common bile duct. The common bile d
Page 113 and 114: EXERCISES, LESSON 6 REQUIREMENT. Th
Page 115 and 116: 14. The texture of the pancreas is
Page 117 and 118: 10. The process of digestion is fac
Page 119 and 120: 7-1. INTRODUCTION LESSON 7 THE HUMA
Page 121 and 122: SUBDIVISION FUNCTION (1) SUPRALARYN
Page 123 and 124: (2) Oropharynx. The portion of the
Page 125 and 126: Figure 7-4. Infralaryngeal structur
Page 127 and 128: 7-8. DIAPHRAGMATIC (ABDOMINAL) BREA
Page 129 and 130: 9. The functions of the supralaryng
Page 131 and 132: SOLUTIONS TO EXERCISES, LESSON 7 1.
Page 133 and 134: LESSON ASSIGNMENT LESSON 8 The Huma
Page 135 and 136: 8-3. THE KIDNEY a. General. (1) The
Page 137 and 138: the cortex layer, it once again bec
Page 139 and 140: eginning of an embryo (the process
Page 141 and 142: (2) Wall structure. The inner linin
Page 143 and 144: Figure 8-5. The human male genital
Page 145 and 146: (1) Surrounding the urethra is a ce
Page 147 and 148: 8. The first coiled portion of the
Page 149 and 150: 21. The external genitalia of the h
Page 153 and 154: 19. The inner lining of the uterus
Page 155 and 156: LESSON ASSIGNMENT LESSON 9 The Huma
Page 157 and 158: LESSON 9 THE HUMAN CARDIOVASCULAR A
Page 159: (1) Red blood cells (erythrocytes).
Page 163 and 164: (3) Relationship of wall thickness
Page 165 and 166: ecome closed for whatever reason, t
Page 167 and 168: Figure 9-5. Main arteries of the hu
Page 169 and 170: Figure 9-6. Main veins of the human
Page 171 and 172: a. Lymphatic Capillaries. Lymphatic
Page 173 and 174: 5. The most common types of white b
Page 175 and 176: 18. In the case of collateral circu
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
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(4) Visceral motor neurons of the A
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organ. The cell bodies of the secon
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(2) Motor pathways. A motor pathway
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11-26. GENERAL Section IX. THE SPEC
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c. Internal Structures of the Eyeba
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(5) Iris. Another structure formed
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11-30. GENERAL Section X. THE SPECI
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11-33. THE INTERNAL EAR a. Labyrint
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Figure 11-14. Diagram of the scalae
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11-36. SEMICIRCULAR DUCTS (FIGURE 1
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f. Cerebellum. The cerebellum has b
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7. Each item below refers to the th
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18. Groups of related functions are
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30. If it carries information from
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46. Name examples of general senses
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61. The orbit is the cavity in the
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73. The central column of the cochl
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SOLUTIONS TO EXERCISES, LESSON 11 1
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19. The ventricles of the brain are
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34. In the ANS, the number of neuro
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52. The outermost layer of the eyeb
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ossicles are: malleus, incus, and s
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COMMENT SHEET SUBCOURSE MD0006 Basi
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