Volume 1

A system of anatomical plates of the human body : accompanied with descriptions, and physiological, pathological & surgical observations / [by] John Lizars.

  • Lizars, John, 1787?-1860.
Date:
1823-1826
Catalogue details

Licence: Public Domain Mark

Credit: A system of anatomical plates of the human body : accompanied with descriptions, and physiological, pathological & surgical observations / [by] John Lizars. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    lung generally consists of three divisions; the left lung usually of two, denominated lobes; and these are formed by fissures, or sulci. In the drawing of Plate I, there appear more than three peculiar to the right lung, which arises from it being inflated; and the right lung is shorter and broader than the left, in consequence of the dia- phragm advancing more atlantad on the right than on the left side, owing to the pressure of the liver, and the heart lying more to the left than to the right side; the heart occupying a sinus or notch in the left lung. The conical shape of the lungs, and other peculiarities, are at once seen in Plate I. Their colour in the adult is bluish grey; in the fetus it is reddish; and in old age purple or livid, with dark spots ; but the colour is greatly modified, ac- cording to the relative quantity of blood present at differ- ent times. From a dead person being commonly placed on his back, the dorsal parts which are dependent are always of a darker tinge. The other objects observed in the thoracic cavity of Plate I., are the phrenic* nerves, and several blood-ves- sels. The phrenic nerve, marked 8, is seen also in Plate VII., where it is observed to derive its origin from the cervical nerves in conjunction with the axillary plexus 9, and is generally described as arising from the third and fourth cervical nerves; but it has always a more ex- tensive origin or connexion. In this drawing of the head and neck, the nerve is seen to be connected with all the cervical nerves, and with the great intercostal nerve 7. In some instances it receives a twig from the hypo-glossal nerve 3, and other twrigs from the nervus vagus 1. When formed, the phrenic nerve 8 descends on the anterior scalenus muscle l, between the subclavian vein u and sub- * Or diaphragmatic.