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) (h) The longer a man Post Date: Wed, 13 Aug 2008 9:42:52 +0000
(g) There is a large gap or diastema between the incisor-like canines and the molars in the lower jaws. (Compare the ox with the cat also in regard to incisors and molars, length of jaws, equipment of feet with hoofs and claws respectively.) (h) The longer a man moves, and the more energetic his movements, the more food is he obliged to take, in order to replace used-up force ; the longer he remains at rest, the less force is used up, and consequently the less food required to replace it.

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In consequence, however Post Date: Wed, 13 Aug 2008 9:30:44 +0000
The same law applies equally to animals (compare with bat and mole). Applying this principle to the ox, it is easily seen that if this animal were at once to grind up its food, while in the act of feeding, to the necessary fineness, it would be obliged to stand or slowly walk about on the pastures for an even longer time than it actually does. In consequence, however, of the division of the stomach into four compartments and the act of rumination, the animal is able to carry on the greater part of the act of mastication while at rest.

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comb Stomach Post Date: Wed, 13 Aug 2008 9:12:59 +0000
It is evident that in this manner much force is saved, and the animal is consequently able to do with less food than it otherwise would. (For the importance of the act of rumination in the case of animals living in a wild state, or those which have reverted to that condition, compare the deer, Section C) The food which has been torn off and only partially masticated passes through the oesophagus into the first great division of the stomach, the paunch or rumen, which forms, in fact, a large receptacle or reservoir ; thence it passes into the second compartment, called, from the fact of its inner mucous surface being raised into a great number of reticular folds, the reticulum, or honey- STOMACH OF A RUMINANT SHEEP (MUCH REDUCED). comb Stomach.

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It is now, for Post Date: Wed, 13 Aug 2008 8:57:43 +0000
After , Lower section of the oesophagus; b, commencement of taking in a sufficient a11 intestine ; paunch I ; 2 reticulum, above which the gutter passing on to (3) the psalterium ; 4, abo- quantlty Of food, the masum. engages in the business of rumination, which proceeds as follows : By a convulsive action of the muscles of the oesophagus, resembling a hiccough, the food, which has been well sodden in the stomach, is forced back from the reticulum into the mouth in the form of small pellets or boluses. It is now, for a second time, carefully masticated, and by the abundant secretion of saliva (from numerous large salivary glands) converted into a pulpy or pap-like mass, and swallowed a second time.

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When the edges Post Date: Wed, 13 Aug 2008 8:43:14 +0000
This time it is conveyed into the third division of the stomach, the psalterium (called many plies by butchers), so called from the fact that its inner mucous membrane is produced into a number of folds, resembling the upstanding leaves of an open book. The reason why the food this time passes into the third, and not back into the two first divisions of the stomach is that the oesophagus, where it opens into the stomach, is prolonged, in the shape of a gutter or half-tube, into the third compart- ment. When the edges of this gutter stand apart, the food falls into the paunch ; when, however, they are applied against each other, thus converting the gutter into a perfect tube, the ruminated food is conveyed into the psalterium.

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We have seen how rumination Post Date: Wed, 13 Aug 2008 8:25:45 +0000
Digestion proper does not take place until the food enters the last compartment, the abomasum, or rennet stomach (see p 8). It takes the latter of its names from a peculiar secretion of its mucous membrane, the rennet, which in the stomach of the young calf causes the milk of the mother to curdle. We have seen how rumination implies a saving of force, and con- sequently of food.

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], produces a larger quantity Post Date: Wed, 13 Aug 2008 8:11:47 +0000
This capacity is not only of great value to the animal, but also to man. The ox, in fact, in virtue of this ruminating capacity, from a certain amount of food unfit for human consumption (grass, flowers of the field, etc.], produces a larger quantity of food suitable for human nourishment (meat, fat, milk) than it otherwise would, and, if supplied ivith an abundance of fodder, is more rapidly and easily fattened.

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With his domestic cattle, however Post Date: Wed, 13 Aug 2008 8:01:03 +0000
All mammals produce milk only as a nourishment for their young. When these are capable of finding their own food, the parents refuse them further access to the teat, and the nourishing spring dries up. With his domestic cattle, however (cow, goat, reindeer, camel, and in some parts even horses), man does not allow matters to proceed so far.

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The value of cow's milk Post Date: Wed, 13 Aug 2008 7:45:27 +0000
He assumes to himself the part played by the young, for by constant removal of the milk (milking) he stimulates the milk-glands so that they con- tinue to secrete for a longer period. The cow, having but one or at most two calves at a time, is provided with only four teats (compare, on the contrary, the large number of teats in the pig, dog, cat, etc, in relation to the large number of their young). The value of cow's milk to man (as a source of butter and cheese), and the further uses of this animal by reason of its flesh, fat, hide, hair, horns, and bodily strength, are too well known to need further discussion.

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For the performance of labours Post Date: Wed, 13 Aug 2008 7:33:49 +0000
The representative of the ox in India and East Africa is the Zebu, or Humped Ox, of which there are several breeds or varieties. It derives its second name from a hump of fat on the front part of the back (see camel). For the performance of labours of various kinds, and for riding, and also on account of its flesh and milk, it is of the highest importance.

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