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They pass out from the Haversian canals at right angles, going to all portions of the compact substance except a thin layer at the surface. In the surface layer of the bone the canaliculi are in communication with the periosteum. Arterial capillary. 2. Venous capillary. 3. Nerve fibers. 4. Lymph vessel.
The cells obtain their materials from the lymph, and the lymph is supplied from the blood. Should food substances, such as sugar, increase in the blood beyond a low per cent, they are converted into a form, like glycogen, in which they are held in reserve, or, for the time being, placed beyond the reach of the cells.
The proximity to the axillary lymph glands makes for easy dissemination of infection when the contused musculature becomes infected. The adjacent brachial nerve plexus is so very apt to become involved, if not actually injured at the time fracture occurs, that paralysis is a probable complication.
The lymph contains, as it were, the poisonous matter resulting from the life and activity of the tubercle bacterium. The fluid is used by hypodermic injection, and when so administered produces both a general and local reaction. The system is powerfully affected. A sense of weariness comes on. The breathing is labored. Nausea ensues; and a fever supervenes which lasts for twelve or fifteen hours.
The size, or coagulable lymph, which appears on the blood, is probably an increased secretion from the inflamed internal lining of the whole arterial system, the thinner part being taken away by the increased absorption of the inflamed lymphatics.
The polished contemporaries of Abolitionists turn over the pages of antique denunciation, and their lymph really quickens in their veins as they read the prophetic vehemence of an Isaiah, the personality of a Nathan, the unmeasured vernacular of Luther, the satire and invective of all good upbraiders of past generations, until they reach their own, which yet waits for a future generation to make scripture and history of its speech and deeds.
If a doctor be careful which, of course, he will be to take the matter from a healthy child, and from a well-formed vesicle, I consider it better than taking it direct from the cow, for the following reasons: The cow-pox lymph, taken direct from the cow, produces much more violent symptoms than after it has passed through several persons; indeed, in some cases, it has produced effects as severe as cutting for the small-pox, besides, it has caused, in many cases, violent inflammation and even sloughing of the arm.
No blood vessels are found in the epidermis, its nourishment being derived from the lymph which reaches it from the dermis. Only the part next to the dermis is made up of living cells. These are active, however, in the formation of new cells, which take the place of those that are worn off at the surface. The epidermis contains no nerves and is therefore non-sensitive.
There were several cysts, and they appeared as though the inflammation attacked only the different lobes of the lungs, leaving others healthy between, Nature throwing out coagulable lymph around the diseased lobe, and forming thereby an air-tight cyst, cutting around the diseased lobe by suppuration, so that it could be carried off by absorption.
Through the combined action of the organs of respiration and the organs that move the blood and the lymph, the cells in all parts of the body are enabled to exchange certain gaseous materials with the outside atmosphere. *Exercises.—*1. How does air entering the lungs differ in composition from air leaving the lungs? What purposes of respiration are indicated by these differences?
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