you CULPEPER’s ENGLISH PHYSICIAN, 
According to this fabric, the heart may be refolved into two mufcles, each of which rr 
conftitutes one of its ventricles. The ufe-of the heart is for the circulation of the 
blood : it receives the blood from the veins,.running from: all. parts. of the body ; 
and propels it again, by its own motion, to all thofe parts, through the arteries. On 
this depend life itfelf, the prefervation of the frame, and the motions and a¢tions of 
allits parts. But, that the reader may have as diftinct an idea as poffible of this pri . 
mary organ of life, we fhall lay before him feveral views of it in the plate annexed F 
where No. 1. reprefents the human heart feen in its convex part, and in its natural 
fituation; B marks the branches of the coronary vein ; C, the coronary artery ee 
D, the right auricle; E, branches‘of veins going from the right auricle; G, the 
trunk of the aorta; H, the trunk of the pulmonary artery ; 1, the afcending trunk 
of the vena cava; L, L, 8c. branches of the aorta, rifing upwards; M, one of the - id 
branches of the pulmonary artery; N, N, &c. branches of the pulmonary vein, 
No. 2. reprefents the heart opened, to fhew the ftructure and form of its ventricles ; 
where A exprefies the mufcular feptum, or partition, which divides the ventricles ; 
B, the right ventricle opening into the right auricle, and into the trunk of the pul- 
monary artery; C, the left ventricle, opening into the left auricle, and intothegreat — 
trunk of the aorta; No. 3. and No. 4. reprefent the heart in different pofitions; 
where A marks the afcending trunk of the vena cava; B, the trunk of the aorta; 
S. branches of the pulmonary vein; D, the deicending trunk of the vena cavas 
and E, part of the right auricle, cut away, to fhew the different arrangement of the 
internal fibres and venous ducts. 
The lungs, or lights, are the inftruments of breathing, and are the largeft ieee 
_- of the thorax: they are fituated in the two fides of it, with the heart, as it were, be- 
‘tween them: and are connected, by means of the mediaftinum, with the ‘fternum and 
vertebra: ; with the heart, by means of the pulmonary veffels, and immediately 
with the afpera arteria.. The colour of the lungs, in infants, is a fine florid red; in 
adults, it is darker; and in old people, livid, or variegated, with black and hip. 
—— inflated, they have fome refemblance to the hoof of an Ox ; and 4 are conve 
ight and left; the left, tae is te {maller, is divide agaia. into 6 CWO} a 
his larger, into three fmall ones, The membrane ¥ Ww a al | 
nded is continuous with the pleura. : % che lungs is 
efic y and they feem, indeed, entirely c compofed of a numbe Pot 
jee) fiefhy texture, and of a variety of veffels. The iis of the 
lungs are the broncbia, the bronchial artery and vein, the nerves, and the lymphatics. 
The ufes of the lungs are, 3. To perform the office of refpiration, by which the 
blood is attenuated in the plexus of the arteries called the rete vajculafum, 2. Fo be 
ne 
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