The War of the Worlds Full Text: Book 2, Chapter 2 : Page 3
They were, I now saw, the most unearthly creatures it is possible to conceive. They were huge round bodies--or, rather, heads--about four feet in diameter, each body having in front of it a face. This face had no nostrils--indeed, the Martians do not seem to have had any sense of smell, but it had a pair of very large dark-coloured eyes, and just beneath this a kind of fleshy beak. In the back of this head or body--I scarcely know how to speak of it--was the single tight tympanic surface, since known to be anatomically an ear, though it must have been almost useless in our dense air. In a group round the mouth were sixteen slender, almost whiplike tentacles, arranged in two bunches of eight each. These bunches have since been named rather aptly, by that distinguished anatomist, Professor Howes, the _hands_. Even as I saw these Martians for the first time they seemed to be endeavouring to raise themselves on these hands, but of course, with the increased weight of terrestrial conditions, this was impossible. There is reason to suppose that on Mars they may have progressed upon them with some facility.
The internal anatomy, I may remark here, as dissection has since shown, was almost equally simple. The greater part of the structure was the brain, sending enormous nerves to the eyes, ear, and tactile tentacles. Besides this were the bulky lungs, into which the mouth opened, and the heart and its vessels. The pulmonary distress caused by the denser atmosphere and greater gravitational attraction was only too evident in the convulsive movements of the outer skin.
And this was the sum of the Martian organs. Strange as it may seem to a human being, all the complex apparatus of digestion, which makes up the bulk of our bodies, did not exist in the Martians. They were heads--merely heads. Entrails they had none. They did not eat, much less digest. Instead, they took the fresh, living blood of other creatures, and _injected_ it into their own veins. I have myself seen this being done, as I shall mention in its place. But, squeamish as I may seem, I cannot bring myself to describe what I could not endure even to continue watching. Let it suffice to say, blood obtained from a still living animal, in most cases from a human being, was run directly by means of a little pipette into the recipient canal. . . .
The bare idea of this is no doubt horribly repulsive to us, but at the same time I think that we should remember how repulsive our carnivorous habits would seem to an intelligent rabbit.
The physiological advantages of the practice of injection are undeniable, if one thinks of the tremendous waste of human time and energy occasioned by eating and the digestive process. Our bodies are half made up of glands and tubes and organs, occupied in turning heterogeneous food into blood. The digestive processes and their reaction upon the nervous system sap our strength and colour our minds. Men go happy or miserable as they have healthy or unhealthy livers, or sound gastric glands. But the Martians were lifted above all these organic fluctuations of mood and emotion.
Their undeniable preference for men as their source of nourishment is partly explained by the nature of the remains of the victims they had brought with them as provisions from Mars. These creatures, to judge from the shrivelled remains that have fallen into human hands, were bipeds with flimsy, silicious skeletons (almost like those of the silicious sponges) and feeble musculature, standing about six feet high and having round, erect heads, and large eyes in flinty sockets. Two or three of these seem to have been brought in each cylinder, and all were killed before earth was reached. It was just as well for them, for the mere attempt to stand upright upon our planet would have broken every bone in their bodies.