The spleen a permanent placenta, the placenta a temporary spleen / by John Jackson.

  • Jackson, John, -approximately 1855.
Date:
1843
Catalogue details

Licence: Public Domain Mark

Credit: The spleen a permanent placenta, the placenta a temporary spleen / by John Jackson. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    prised in the Circulation of the Blood, there are three GRAND AGENTS Concerned in its propulsion—one for each system; and instead of the hepatic system being dependent on the left ventricle for the propulsion of the portal blood, the left ventricle is actually indebted to the agent which pro- pels the. blood through the hepatic system for returning a portion of blood to the right side of the heart; that portion is, the blood supplied to the digestive organs by the cceliac and mesenteric arteries. 3. The First, or hepatic vascular system consists of—1, the Spleno-hepatic Vein—under which terai is included the splenic vein and its roots or Spleen, and the portal vein and its branches, or the sub-hepatic veins ; 2, the portal plexuses, or hepatic capillaries; and 3, the supra-hepatic veins. 4. The Second, or pulmonary vascular system consists of— 1, the right auricle; 2, the right ventricle; 3, the pulmonary artery and its branches; 4, the pulmonary capillaries; and 5, the pulmonary veins. 5. The Third, or general vascular system consists of—1, the left auricle; 2, the left ventricle; 3, the aorta and its ramifications; 4, the capillaries in every part and organ except the liver and lungs; and 5, all the veins except the spleno-hepatic, the supra-hepatic, and the pulmonary, 6. Each of the three vascular systems possesses—1, a recipient cavity; 2, a propulsive agent; 3, an afferent trunk, and ramifications; 4, capillary vessels: and 5, efferent ves- sels and their trunks.* 7. The recipient cavity in the hepatic vascular system is the Spleno-hepatic Vein; in the pulmonary system the right auricle ; and in the general system the left auricle. 8. The propulsive agent in the hepatic vascular system is the Spleno-hepatic Vein ; in the pulmonary system, the right ventricle ; and in the general system, the left ventricle. 9. The afferent trunk and ramifications in the hepatic vas- cular system are the Spleno-hepatic Vein; in the pulmonary system the pulmonary artery and its branches; and in the general system, the aorta and its branches. 10. Thus the Spleno-hepatic Vein is in the hepatic vas- * Affero, I bring to, or in ; effcro, I carry out, or from.