The laws of health / [David Nunes Nabarro].

  • Nabarro, David Nunes, 1874-
Date:
[1905?]
Catalogue details

Licence: In copyright

Credit: The laws of health / [David Nunes Nabarro]. Source: Wellcome Collection.

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    67. The blood liquid carries food nourishment to all the tissues of the body to enable them to perform their duties. It also brings away from the tissues the waste materials which are no longer of any use. The two most important of these are (a) carbonic acid gas (C02), and (b) a chemical substance called urea. All the tissues of the body are constantly forming these waste materials, which they send into the blood to be got rid of. The carbonic acid gas is removed from the blood by the lungs during breathing. The urea is removed by the kidneys and passes from the body in the urine. Fig. 5.—The Corpuscles of the Blood, a, White corpuscles ; b, red corpuscles of man (some are seen on the flat, others edgewise); c, nucleated red corpuscle of frog. 68. The red corpuscles have the power of taking up into their substance the gas called oxygen which they carry to all parts of the body. Without oxygen we cannot live. Our muscles and other tissues require oxygen to burn up the fuel brought to them by the blood, just as a steam-engine requires air to burn up the coal in its fire. The white corpuscles of the blood act as the dustmen of the body. They can kill and destroy the microbes of disease which may get into the body. They can also destroy any dirt particles. These germs and particles of dirt are usually taken by the white corpuscles to the filtering glands which exist in A
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