Part 52

ARTICLE FIFTH.

REMARKS UPON THE PULMONARY ARTERY AND VEINS.

Though the two kinds of blood are separate, yet the mechanical phenomena of their courses are analogous in the aorta and the pulmonary artery, and in the general and the pulmonary veins. ib.

ARTICLE SIXTH.

ABDOMINAL VASCULAR SYSTEM WITH BLACK BLOOD.

Situation, forms, general arrangement, anastomoses, &c.—Origin and termination in the capillaries.—Abdominal portion.—Hepatic portion.—Differences between them. 433

Organization, properties, &c.—Analogy with the veins in this respect.—Peculiar arrangement in the hepatic portion.—Absence of valves.—Why. 436

Remarks upon the motion of the black abdominal blood.—Comparison between the liver and the lungs.—Their difference as it regards the blood that goes to them.—Mechanism of the circulation of this system.—Influence of the accessory causes. 438

Remarks upon the liver.—It performs another function besides the secretion of bile.—Proofs.—We are ignorant of this function.—It must be extremely important.—Various proofs.—The liver exhibits phenomena that no other gland does.—It is not certain that the black abdominal blood serves for the secretion of bile.—Proofs.—General observations.—Experiments. 440

Remarks upon the course of the bile.—Course of this fluid during abstinence and during digestion.—Cystic bile.—Hepatic bile.—Reflux towards the stomach during vacuity and fulness.—Experiments. 446

Development.—There is only one vascular system in the fœtus.—It is divided into three at birth.—State of the umbilical vein and the vena porta in the fœtus.—Relative size of the liver at this period.—Phenomena at birth.—Different influences of this system in the following ages. 450

END OF CONTENTS TO VOL. I.

VOLUME SECOND.

CAPILLARY SYSTEMS.

PAGE.

There are two of them.—Their general arrangement.—Their opposition. 3

ARTICLE FIRST.

OF THE GENERAL CAPILLARY SYSTEM.

General arrangement of this system. 4

I. General division of the Capillaries.

Of the organs in which the capillaries contain only blood. 6

Of the organs in which the capillaries contain blood and fluids differing from it.—Serous system taken for an example.—Experiments by injections.—Various other systems present analogous facts.—Proportion of the blood and the fluids differing from it. ib.

Of the organs in which the capillaries do not contain blood. 8

II. Difference of Organs in respect to the number of their Capillaries.

There are many classes of organs in this respect.—Why the capillaries are very much developed in some.—Consequences as it regards diseases. 9

Remarks upon injections.—Their insufficiency in making us acquainted with the small vessels. 10

III. Of the proportions which exist in the Capillaries between the Blood and the Fluids that differ from it.

Continual varieties in the proportion.—Cause of these varieties.—They are very numerous. 12