T/je Anatomy of a 'HOKSV.. 105 



into ihtJorta; for it cannot come back again into the 

 Ear, bccaufe of the Valvuht Mitraks. 



The Jorta having receiv'd the Blood q-j a 

 from the Left Ventricle, fends out two fmall ^^'^• 



Branches, called the Coronarics^ which go the Heart, and 

 then forming a fmall Arch, by which the Force of the 

 Blood is fomewhat abated, in its Expullion 

 it is divided into ih^Jorta afcending and de- ^/^^'PfJ^u^'on 



Rending. :nto all Parts. 



The afcending Trunk climbing up by ri ^ u ^ • 

 the Windpipe to the Top of the Brealt, fends j'^'^s''^ 

 forth two Branches, call'd the Subclavian^ 

 which run under the Channel-bones on each Side. Thefe 

 fend forth feveral other Branches, both from their upper 

 and under Side ; from their upper Side fpring thofe Arte- 

 ries, which, in Men, are call'd the Cervical, being partly 

 fpent on the lUufcles of the Neck and Bread, and partly on 

 the Gkuduhv Thyrcilcs. Out of their lower Side proceed 

 the fuperior Intercojlals^ which palling thro' th,e Cheft, 

 fend forth feveral Branches to the Arms in human Bodies, 

 and to the P'^ore legs in Brute Creatures. 



Where the Subclavians go off from the 'The Carotid 

 great Artery, on each Side there arife two Queries. 

 other principal Branches, which afcend upwards towards, 

 the Head, and are called the Carotid Arteries : Thefe are 

 fpent chiefly on the Brain, form.ing there the Rete Mi)a~ 

 bitCy and Plexus ChorcideSy he. but as they afcend, they 

 detach feveral Branches to the Windpipe, Larynx^ fome 

 to the Tongue and lower Jaw, and others to the external 

 Parts of the Head. By thefe four principal Branches, to 

 "wit, the Subclavian and Carotids^ the whole Head and 

 Neck, as alfo the external Parts of the Chelt and Fore-legSj 

 are fupplicd with Nourilhment. 



The defcending Aorta^ as it goes down The dcfcendlng 

 towards the A'lidriff, fends forth the inferior Trunk, 

 intercojlah and the Bronchial Artery, which accompany 

 the Branches of the Windpipe in the Lungs ; and when it 

 arrives at the Midriff, it detaches thofe called the Phre- 

 7nck Arteries, which are difperfed through the Midriff 

 and MediaiVmum. After it has palled through the Midriff, 

 it marches dov»mwards as far as the lall Vertebra of the 

 Loins, but by the Way fends off feveral Branches to the 

 Stomach and other Liteftines, as the Caliach., the Sple- 

 niU\ and the upper Meferiterick \ after thefe fpring forth 

 H 4 the 



