jJ The Art of Fa r r i e r y 



and their Points and Sides tied by fmall Fibres to 

 the flefhy PrcduClions \ io that when the Ventricle 

 contrails and the oppofite Sides approach one ano- 

 ther, the Points of the Valves meet, and their 

 Lateral Springs being relaxed, the Sides are likewife 

 mads to join one another by the Blood which gets 

 between them and the Sides of the Ventricle : The 

 three Valves thus united form a Concave Cone, 

 •which hinders the Return of the Blood to the Auri- 

 cle : It is from thence thruft out at the Arteria 

 Vulmonalis, which rifes immediately out of the 

 right Ventricle j its Mouth is lefs than the Cava : 

 It has three Valves called Szgmoidales or Semilunares, 

 becaufe they rcfemble a half Moon, or the old 

 Xjreek Sigma, which v/ss v/rit like a C. Their 

 Subftance Is membranous; when they feparate, 

 they give paffage to the Blood from the Ventricle 

 into the Artery, but they fhut the PafTage and are 

 tlirull together by the Blood, if it endeavours to 

 return. 



The Arteria Pulmonalis carries the Blood to the 

 Fena Pulmonalis, which difchargeth itfelf through 

 the left Ear into the Ventricle of the fame Side. 

 At the Orifice of this -Ventricie there arc two 

 Valve?, called Mitrales, becaufe they refemble a 

 Mitre. They are broader than the other Valves, 

 and are fituated, and have the fame Ufe as the 

 Tricufpidcs in the right Ventricle. 

 Defcri^ition The Aorta or great Artery, arifes immediately 

 ntihc (jyf Qf (}^g ]gff Ventricle; it has three Valves, 



"^^^' which have the fame Ufe and Figure as the Semi- 

 lunar es in the Arteria Pulmonalis, 

 Defcription The Heart is a compound Mufcle, and it*s 

 ^ ^^^ Subftance is made of Fibres, of the fame Nature 



• as thofe of other Mufcles : There are feveral Orders 

 of them which have different Diredlions, and all 

 their Tendons are in the Bafis of the Heart. From 

 the Aorta, juft by one of the Coronary Arteries, 

 go out two Tendons, of which the firft paiTes thro* 

 the Pulmonary Artery (or Artery leading to the 



Lungs) 



