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derly, and, consequently, beneficial manner, it is rience the dreadful consequences. Observe, all necessary that the body be in a natural and up the short ribs, from the lower end of the breastright position. The following engraving repre-bone, are unnaturally cramped inwardly toward sents the Thorax, or Chest, which contains the

the spine, so that Heart and Lungs; and reason teaches, that no or

the liver, stomach, gans should be in the least infringed upon, either

and other digestive by compressions, or by sitting in a bent position.

organs in that viciThe Lungs are reservoirs for the air, out of which

nity, are pressed we make sounds, by condensation. All are fami

into such a small liar with the hand-bellows: observe the striking analogy between it and the body, in the act of

compass, that their

functions are greatspeaking, singing and blowing. The wind-pipe is like its nosle, the lungs like the sides, and the ab

ly interrupted, and dominal and dorsal muscles, like its handles; of

all

the vessels, course, to blow with ease and power, one must bones and viscera are more or less distorted and take hold of the handles; to speak and sing right, enfeebled. Cease to do evil, and learn to do well. the lower muscles must be used; for there is only one right way of doing anything.

17. This engraving,

of a bell-shaped glass, Larynx;..

C, C, shows how the Wind-pipe,

air gets into the lungs,

and some of its effects. Collar bone,

A head is placed on Bronchia,

the cork, T, represent

ing the wind-pipe, and Heart & Lungs,

having a hole through

cit. L, represents a 7 Long Ribs, :

bladder, tied to the Diaphragm,

D

lower end of the cork,

to indicate a lung. At 5 Short Ribs,

D, is seen the dia. Dorsal and

phragm. The cavity

of the bell represents Abdominal

the inside of the thorax, where the heart and lungs Muscles....

are: there is no communication with the external 14. This is a view of a well developed and air, except through the hole in the cork; air, ennaturally proportioned chest; with space for the tering through that hole, can go only into the blad. lungs, the short ribs thrown outwardly, affording der. Now, when the centre of the diaphragm is ample room for the free action of the organs: it is raised to D, the bladder will be flaccid and devoid the true model of the form of one who would live of air; but when it is dropped, to the situation of to a good old age.

the dotted line, a tendency to a vacuum will be 15. TIGHT DRESSING. No one can enjoy good only through the hole in the cork; the air expand

the consequence,

which can be supplied with air; health, or perform any kind of labor with

ease, read, speak, or sing, when the thorax is habitual- ing the bladder to its full extent, is shown by the ly compressed. It diminishes the capacity of the

dotted circle, around L; and when the diaphragm lungs, for receiving the necessary quantity of air

is elevated again, the air will be forced from the to purify the blood, and prevents the proper action bladder; thus, the lungs are inflated and exhausof the diaphragm. The following engraving shows ted by this alternate operation of the diaphragm, the alarming condition of the chest, when com- dominal muscles; hence, the comparison between

and of the contraction and elongation of the abpressed by tight lacing; a practice that has hur- the vocal organs proper, and a pair of bellows, is ried, and is now hurrying, hundreds of thousands

distinctly seen. to a premature grave; besides entailing upon the offspring an accumulation of evils, too awful to

MUSCULAR ACTION. These contemplate. What is the difference between

two engravings represent some killing one's self in five minutes with a razor, and

muscular fibres in two stales : doing it in five years by tight lacing, or any other

the upper one at rest, with a re. bad habit? Our clothing should never be so tight laxed nervous filament ramified through the fibres, as to prevent the air from coming between it and as seen under the microscope ; and the lower one in the body.

a state of contraction, and the fi16. Here follows an outline of the chest, or

bres in zigzag lines, with a simi. thorax of a female, showing the condition of the

lar nervous filament passing over bones of the body, as they appear after death, in

them: apply the principle to all every one who has habitually worn stays and muscles. The subject might be greatly extended; corsets, enforced by tight lacing. “But,' says one, but for further information, see the Author's large "I do not lace too tight. If you lace at all, you work on Physiology and Psychology, which will most certainly do, and will, sooner or later, expe- be published as soon as convenient.

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stiffness, and too much laxity, of the muscles; be
natural and easy. Avoid leaning backwards or
forwards, to the right or left: and especially, of
resting your head on your hand, with the elbow
on something else: by which practice, many
have caused a projection of one shoulder, indu-
ced spinal affections, &c. Beware of every thing and wholly fill up the cavity of the chest: every
that is improper : such as trying how much you one has two hearts, for the two different kinds of
can lift with one hand, &c.

blood, and each heart has two rooms: a, right 20. Here follows a representation of the position auricle, that receives all the blood from every part of the diaphragm, and illustrations of its actions, of the body, through the vena cava, or large vein, in exhaling and inhaling. Figure 1, in the left which is made up of the small veins, e, e, e, e, e; engraving, represents the diaphragm in its great- it thence passes into the right ventricle, i, thence est descent, when we draw in our breath : 2, mus- into both lungs, where it is purified; after which cles of the abdomen, when protruded to their full it passes into the left auricle, and left ventricle, extent, in inhaling: 1, in the right engraving, the then into the aorta, o, and the carotid and subcla-, diaphragm in its greatest ascent in expiration: 2, vian arteries (u, and 0,) to every part of the body; the muscles of the abdomen in action, forcing the returning every three or four minutes.

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23. Here is a horizontal view of the Glottis : N, F, are the arytenoid cartilages, connected with the chordæ vocales, (vocal cords, or ligaments,) T, V, stretching across from the top of the arytenoid to the point of the thyroid cartilage: these cords can be elongated, and enlarged to produce lower sounds, and contracted and diminished for higher ones: and, at the same time, separated from each other, and allowing more condensed air to pass for the former purposes; or brought nearer together, to favor the latter: there are a great many muscles attached to the larynx, to give variety to the modifications of voice in speech and song

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