A mechanical essay upon the heart, in three anatomical lectures. Wherein I. The heart is demonstrated to be a compleat epitome of myology ... II. The origin and nature of the blood ... III. The praeternatural state of that fluid / By William Wood.

Wood, William, 1688-

Date:: 1729

Credit: A mechanical essay upon the heart, in three anatomical lectures. Wherein I. The heart is demonstrated to be a compleat epitome of myology ... II. The origin and nature of the blood ... III. The praeternatural state of that fluid / By William Wood. Source: Wellcome Collection.

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$\ * » l - ^\ • J1 V i * v . w < X \ THE Infide of both Ventricles has a great many Furrows, which are much deeper and larger, and likewife more in Num¬ ber in the left than the right. V ' i #«,-* •'* V- - • ‘ J . fc ¥ ^ ' ( IN the Cavities of both Ventricles there are alfo a great Number of fibrous Productions, long and round, different both in Shape and Size. Thefe are the Fibres which did not mount outwardly, to be inferted with the others in the Tendon of the Bafis of the Heart, but terminated in the Cavity, to form the Tapilla or Column#. The right Ventricle, being much thinner than the left, has a tendinous Pillar of feveral Fibres running from the Septum, or middle Partition, to its oppolite Side, to prevent too great a Dilatation in its TAaftole, and to alfifl in the Syftole of the faid Ventricle. [See Fig. 4. Plate r,J THE other fibrous Productions, riling moftly from the Bot¬ tom of the Ventricle, mount upwards in tendinous Strings to be inferted into the Valves, call’d Tricufpides from their Triangu¬ lar Figure. Thefe Valves are made of a thin ftrong Mem¬ brane, and are circularly inferted into the Tendon, which fur- rounds the Mouth of the right Ventricle. [<5Ve Fig. 5. Plate 1.] iw* .7 4 T' ^ IN the left thefe fibrous Productions (as in the right) go to be inferted into the Mentbrarue Mitrales: So call’d from their Likenefs to a Mitre. Thefe Membranous Valves are circularly inferted into the Tendon, which furrounds the left Ventricle. [V^Fig. 4. Plate i.J ADJOINING to the Bafis are two more Cavities asAppen- dages to the Heart, lying upon the two Ventricles, which are call'd Auricula, from the Refemblance they have of an human Ear. They have an obtule Point,which, with their Bale or (ori¬ gination, form an Obtufe Triangle. They are divided into right and left Auricles becaufe of their Situation. They are com¬ pos’d of two Plans ofFibres, which are oblique Prilms, and de- C cuffate$