SMALL INTESTINE. Intestinum tenue. It comprises the duodenum, jejunum and ileum. Tunica serosa. Peritoneal covering containing simple squamous epithelium. F Tela subserosa. Connective tissue underlying the serosa. F
Tunica muscularis. Two principal muscle layers of the intestinal wall. F
Longitudinal layer. Stratum longitudinale. Outer layer of longitudinally coursing muscle fibers. F
Circular layer. Stratum circulare. Inner layer of circularly coursing muscle fibers. F Tela sumucosa. Displaceable layer between the muscularis mucosae and the muscularis consisting primarily of collagenous connective tissue bearing blood vessels and nerves. F Tunica mucosa. Intestinal mucous membrane consisting of simple columnar epithelium, connective tissue (lamina propria) and muscularis mucosae.
Lamina muscularis mucosae. Layerofsmooth muscle between the lamina propria and submu-cosa. Its action produces folds in the mucosa. F Circular folds [Valves of Kerckring]. Plicae circulares. Permanent folds of mucosa and sub-mucosa spanning nearly 2/3 of the intestinal lumen and projecting up to 8 mm high, perpendicular to the intestinal axis. E F Intestinal villi. Villi intestinales. Fingerlike projections about 0.5-1.5 mm in length. F Intestinal glands. Gll. intestinales. Cryptlike glands. F
Solitary lymphatic follicles. Folliculi lym-phatici solitarii. Solitary lymphatic nodules in the lamina propria (p. 405.42) F Aggregated lymphatic follicles [[Peyer's patches]. Folliculi lymphatici aggregati. Aggregation of several lymphatic nodules in the ileum.
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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.