| 单词 | medullary sheath |
| 例句 | MS, medullary sheath, the dark, irregular ring just inside the bundles. Wood and Forest 2011-03-01T03:00:42.647Z In the white masses the medullary sheath is present. The Mind and Its Education The medullary sheath and the primitive sheath are not, strictly speaking, parts of the nerve cell, but appear to be growths that have formed around it. Physiology and Hygiene for Secondary Schools Each one of the perforations is the entrance to an oblique tunnel, which is bored in the medullary sheath of the twig. Social Life in the Insect World The investment of nerve fibers with a protective covering or medullary sheath, consisting of white, fat-like matter. Youth: Its Education, Regimen, and Hygiene This core is surrounded by the white substance of Schwann, or medullary sheath, which gives the nerve its characteristic ivory-white appearance. A Practical Physiology It will help in understanding the peripheral system to remember that a nerve consists of a bundle of neurone fibers each wrapped in its medullary sheath and sheath of Schwann. The Mind and Its Education These, on entering, lose the medullary sheath and separate into a number of branches that penetrate the corpuscle in different directions. Physiology and Hygiene for Secondary Schools Axons without the medullary sheath are found in the sympathetic nerves. Physiology and Hygiene for Secondary Schools Surrounding the axis cylinder is a thick, whitish-looking layer, known as the medullary sheath, and around this is a thin covering, called the primitive sheath, or neurilemma. Physiology and Hygiene for Secondary Schools The medullary sheath may also aid in the nourishment of the axis cylinder. Physiology and Hygiene for Secondary Schools |
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