IV.
All the different parts of the same organism are modified by each other, and in this manner the functions become mutually modified.
Now, man and woman differ from each other in important organs.
Each of the sexes must therefore differ from the other not only through the organs that distinguish them, but through the modifications produced by the presence of these organs.
This, gentleman, is my first syllogism: I know that we shall not contest this point—it is classical Biology.
Let us investigate anatomically the organic differences to which sexuality subjects man and woman.
Nervous System. The so called nerves of feeling are more fully developed in woman than in man, those of motion are less developed in the former than in the latter; the cerebellum is more fully developed in the head of man than in that of woman; in the latter, the antero-posterior diameter of the brain preponderates over the bi-lateral, which is greater in proportion in the masculine sex: it is also observed that the organs of observation, circumspection, subtleness and philoprogenitiveness are more prominent in the head of woman than in that of man, in which the reasoning organs, with those of combativeness and destructiveness predominate.
Locomotive System. Man is larger than woman, he has more compact bones, and larger and better developed muscles, his thorax is the reverse of that of woman, in which, the greatest breadth is between the shoulders, while, with him, it is at the base; the pelvis is larger and broader in the female than the male sex.
Epidermic and cellular systems. Man has a more hairy skin than woman; what is called fat is less abundant in the masculine than in the feminine organism; in general, the skin of man is rougher, and his form less round; woman has longer and more silky hair. Splanchnic organs. The cerebral mass is the same in proportion in both sexes, as well as the organs of the brain, with the exception of the predominances which we have pointed out; the respiratory systems differ somewhat; woman breaths higher than man; in the latter, the circulation is more active and energetic.
To these physical differences correspond intellectual and moral differences.