BIOL1300 Study Guide - Midterm Guide: Lesser Sciatic Foramen, Myelin, Adrenal Gland
Document Summary
Lec 16: organization of the thorax, abdomen, & pelvis. Describe the basic architecture of the trunk and trunk wall. Limits: superior thoracic aperture (t1, 1st ribs, upper border of manubrium sterni) to inferior pelvic aperture; includes bony pelvis and perineum; separated from thigh anteriorly by inguinal ligament line. Supported by vertebral column (attached to ribs above and hip bones below) and erector spinae. Scalene muscles suspend ribs 1 and 2 from cervical vertebrae. Trapezius suspends pectoral girdle (scapular spine, acromion, and clavical) from cervical vertebrae and base of skull. Subdivisions: thoracic and abdominopelvic regions separated by respiratory diaphragm. Thoracic cavity opens into root of neck via thoracic inlet (superior thoracic aperture) o. Subdivided into right hemithorax and left hemithorax by mediastinum (mediastinum contains fibrous pericardial sac that is tough, inelastic and fused to upper surface of diaphragm: abdominopelvic cavity clsed below by conical pelvic diaphragm.
