14 Cervical enlargement. Intumescentia cervi-calis. Enlargement ofthe spinal cord from C3 to T2 owing to the larger supply region for the arms. D
15 Lumbosacral enlargement. Intumescentia lumbosacralis. Expansion of the spinal cord from T9-10 to L1-2 caused by the greater supply region for the lower limbs. D
16 Conus medullaris. Tapered termination of the spinal cord at the level of L1-2 where it becomes continuous with the filum terminale. D
17 Filum terminale (spinale). Thin terminal prolongation of spinal cord attached inferiorly to the posterior surface of the coccyx. D E
18 Terminal ventricle. Ventriculus terminalis. Enlargement of the central canal at the end of the conus medullaris. E
19 Anterior median fissure. Fissura mediana anterior. Deep longitudinal fissure along the anterior aspect of the spinal cord. F
20 Posterior median sulcus. Sulcus medianus posterior. Median longitudinal groove between the right and left posterior funiculi. F
21 Posterior median septum. Septum medi-anum posterius. Thickening of the sub-arachnoid connective tissue within the posterior median sulcus, less in the cervical region, more in the thoracic segment. F
22 Anterolateral sulcus. Sulcus anterolateralis. Shallow furrow occasionally present at the exit of the ventral root fibers. F
23 Posterolateral sulcus. Sulcus posterolateralis. Longitudinal groove external to the boundary between the lateral and posterior funiculi. It marks the site of entry of the dorsal spinal nerve roots. F
24 Posterior intermediate sulcus. Sulcus inter-medius posterior. Shallow longitudinal fissure on both sides of the median sulcus. Externally it marks the boundary between the funiculi gracilis and cuneatus. F
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.