1998. After all three elements are united into one point, into one system, as is the case in the circulation, where the venous blood represents the water, the arterial blood the earth and air, no new system can further originate in the vegetative body.
4. SEXUAL SYSTEM.
1999. In so far as the animal adopts into itself, or is rather based upon, the whole plant, the blossom or Sex is also developed in it. The vegetable sex consists of seed, capsule, and corolla.
2000. The seed is the first part of the blossom which is put forth in the plant. The most inferior or asexual plants have only seeds devoid of capsule and corolla, and produced without the concurrence of female and male parts. The blossom in the animal is therefore in the beginning also nothing but seeds or ova. Thus these animals are asexual. Such as the Infusoria, whose body directly divides into new animals, like the fungi.
2001. The second floral organ is the capsule, which contains on its borders or dissepiments the seeds, and on its apex the stigma, or the opening of the cyst.
2002. So also in the succeeding forms of animal life the animal capsule or uterus originates. The orifice corresponding to the stigma is the mouth of the womb; the seeds upon the septum become ovary.
2003. The lowest animals, as the Polyps, are fundamentally none other than such an uterine system. The polyp's mouth is the os uteri; the sac formed by the polyp's body is the uterus, in which ova-cysts or ovaries develop, that open into the margins of the month.
2004. In such animals the uterus and intestine, as likewise the mouth and uterine orifice are fundamentally one organ; nutritive matter and ova are also one in kind. External tegument as branchial organ is at the same time also a tegument of the uterus.
2005. The higher animals are distinguished from the lower by separation of all these intricate and, as it were, coalesced organs.
2006. Digestion, respiration and nutrition, growth and propagation, are originally of one kind. But with further development come the male parts also, which belong to the category of the organs.