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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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Essentials of Human Physiology

Essentials of Human Physiology

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.

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