Republic of the Philippines COMMISSION ON HIGHER EDUCATION REGION V POLANGUI COMMUNITY COLLEGE Polangui, Albay INTRODUCTION The Anatomy and Physiology module introduces the structure and function of the human body. You will read about the cells, tissues and membranes that make up our bodies and how our major systems function to help us develop and stay healthy. OBJECTIVES Identify the directional terms and body planes by using examples Directional Terms Directional terms describe the positions of structures relative to other structures or locations in the body. Superior or cranial - toward the head end of the body; upper (example, the hand is part of the superior extremity). Inferior or caudal - away from the head; lower (example, the foot is part of the inferior extremity). Anterior or ventral - front (example, the kneecap is located on the anterior side of the leg). Posterior or dorsal - back (example, the shoulder blades are located on the posterior side of the body). Medial - toward the midline of the body (example, the middle toe is located at the medial side of the foot). Lateral - away from the midline of the body (example, the little toe is located at the lateral side of the foot). Proximal - toward or nearest the trunk or the point of origin of a part (example, the proximal end of the femur joins with the pelvic bone). Distal - away from or farthest from the trunk or the point or origin of a part (example, the hand is located at the distal end of the forearm). Planes of the Body Coronal Plane (Frontal Plane) - A vertical plane running from side to side; divides the body or any of its parts into anterior and posterior portions. Sagittal Plane (Lateral Plane) - A vertical plane running from front to back; divides the body or any of its parts into right and left sides. Axial Plane (Transverse Plane) A horizontal plane; divides the body or any of its parts into upper and lower parts. Median plane - Sagittal plane through the midline of the body; divides the body or any of its parts into right and left halves. Body Cavities The cavities, or spaces, of the body contain the internal organs, or viscera. The two main cavities are called the ventral and dorsal cavities. Ventral cavity The ventral is the larger cavity and is subdivided into two parts (thoracic and abdominopelvic cavities) by the diaphragm, a dome shaped respiratory muscle. Thoracic cavity The upper ventral, thoracic, or chest cavity contains the heart, lungs, trachea, esophagus, large blood vessels, and nerves. The thoracic cavity is bound laterally by the ribs (covered by costal pleura) and the diaphragm caudally (covered by diaphragmatic pleura). Abdominal and pelvic cavity The lower part of the ventral (abdominopelvic) cavity can be further divided into two portions: abdominal portion and pelvic portion. The abdominal cavity contains most of the gastrointestinal tract as well as the kidneys and adrenal glands. The abdominal cavity is bound cranially by the diaphragm, laterally by the body wall, and caudally by the pelvic cavity. The pelvic cavity contains most of the urogenital system as well as the rectum. The pelvic cavity is bounded cranially by the abdominal cavity, dorsally by the sacrum, and laterally by the pelvis. Dorsal cavity The smaller of the two main cavities is called the dorsal cavity. As its name implies, it contains organs lying more posterior in the body. The dorsal cavity, again, can be divided into two portions. The upper portion, or the cranial cavity, houses the brain, and the lower portion, or vertebral canal houses the spinal cord. The Anatomical Regions of the Body The anatomical regions (shown) compartmentalize the human body. Just like on a map, a region refers to a certain area. The body is divided into two major portions: axial and appendicular. The axial body runs right down the center (axis) and consists of everything except the limbs, meaning the head, neck, thorax (chest and back), abdomen, and pelvis. The appendicular body consists of appendages, otherwise known as upper and lower extremities (which you call arms and legs). https://www.dummies.com/education/science/anatomy/anatomical-regionsbody/ Here’s of the axial body’s main regions: Head and neck • • • • • • • • Cephalic (head) Cervical (neck) Cranial (skull) Frontal (forehead) Nasal (nose) Occipital (base of skull) Oral (mouth) Orbital/ocular (eyes) Thorax • • • • • • • • Axillary (armpit) Costal (ribs) Deltoid (shoulder) Mammary (breast) Pectoral (chest) Scapular (shoulder blade) Sternal (breastbone) Vertebral (backbone) Abdomen • • • • • • • • Abdominal (abdomen) Gluteal (buttocks) Inguinal (bend of hip) Lumbar (lower back) Pelvic (area between hipbones) Perineal (area between anus and external genitalia) Pubic (genitals) Sacral (end of vertebral column) Here’s a list of the appendicular body’s main regions: Upper extremity Antebrachial (forearm) Antecubital (inner elbow) Brachial (upper arm) Carpal (wrist) a list Cubital (elbow) Digital (fingers/toes) Manual (hand) Palmar (palm) Lower extremity • • • • • • • • Crural (shin, front of lower leg) Femoral (thigh) Patellar (front of knee) Pedal (foot) Plantar (arch of foot) Popliteal (back of knee) Sural (calf, back of lower leg) Tarsal (ankle) NAME: __________________________ BLOCK : _______ SCORE: ______ Multiple Choice: 1. The trunk is inferior to which body part? A. Head b. back c. knee d. left foot 2. Which statement is false regarding the anatomical position?* a. The palms face the front. b. The thumbs point away from the body. c. The head is turned to the left side. d. The posture is standing erect. 3. The nose is superior to the navel.* a. True b. False 4. What’s another name for anterior?* a. Dorsal b. Ventral c. Cranial d. Caudal 5. The wrist is distal to the elbow. a. Internal b. caudal c. External d. Cranial 6. The elbow is _________between the wrist and shoulder.* a. Medial b. Intermediate c. Distal d. Lateral 7. Which statement is false regarding the anatomical position? a. The palms face the front. b. The thumbs point away from the body. c. The head is turned to the left side. d. The posture is standing erect. 8. The nose is superior to the navel. a. True b. False 9. The word anterior means: a. At or toward the front of the body b. Away from the insertion point of a structure. c. At the back or rear of the body. d. Toward the middle of the body. 10. The heart is _______ to the shoulder. a. Medial b. Lateral c. Distal d. Proximal 11. the right elbow is distal to the : a. left elbow b. right shoulder c. digits of the right hand d. left kneecap 12. The body plane that divides the body into right and left portions is called the: a. frontal plane b. horizontal plane c. sagittal plane d. jet plane 13. The skin is _________ to the skeletal bones. a. Superior b. Proximal c. Superficial d. Inferior 14. The heart is _______ to the shoulder. a. Medial b. Lateral c. Distal d. Proximal 15. What’s another name for anterior? a. Dorsal b. Ventral c. Cranial d. Caudal ESSAY: Answer the questions comprehensively. 1. Why should you use directional terms when describing the location of body parts instead of more common descriptions such as on top of, below, or to the side? 2. What is plane? 3. How many planes be used to view body structures? 4. What are the major regions of the body? 5. What are the two major cavities in the body, and what cavities does each contain in turn? 6. What are the ways in which the abdominopelvic cavity may be further divided into smaller regions?