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Updated: June 10, 2025
In each one of these they find a tiny hole, and into this they creep, and then they pour into the ovule all the protoplasm from the pollen-grain which is sticking above, and this enables it to grow into a real seed, with a tiny plantlet inside. This is how the plant forms its seed to bring up new little ones next year, while the leaves and the roots are at work preparing the necessary food.
Independently of the three conditions where excessive menstruation is connected with vaso-motor paralysis, a fourth may be found directly in the excitement of the ovarian plexus of nerves. This evolution of nerve-force which accompanies the maturation of the ovule, is the immediate cause of the afflux of blood to the utero-ovarian vessels.
Darwin, of plants which are more fertile with the pollen of another species than with their own; and there are others, such as certain 'fuci', whose male element will fertilize the ovule of a plant of distinct species, while the males of the latter species are ineffective with the females of the first.
Careful examination further proves that the whole substance of the nettle is made up of a repetition of such masses of nucleated protoplasm, each contained in a wooden case, which is modified in form, sometimes into a woody fibre, sometimes into a duct or spiral vessel, sometimes into a pollen grain, or an ovule.
A little later certain changes take place in the ovule, later still other changes, and finally about the fifteenth day a slight development of the new human being can just be outlined by the help of the microscope, which, as before stated, has form at about the third week after conception.
When the child discovers that the ovules are attached to the ovary by little stems, this very important question can be answered, How are the ovules nourished? They must have food, or they cannot develop into seeds. The sap, which is the food of the plant, runs through the little stems that hold the ovules to the ovary, and thus, entering the ovules, nourishes them. The ovule has no embryo.
It is about twelve days after conception before the impregnated ovule, which undergoes many changes during this time, makes its escape from the ovary where it became impregnated and enters one of the Fallopian tubes, thence gradually descending into the cavity of the womb. Here it begins to mature and become fitted for its birth into the outer world.
The ovule, or future seed, is now fertilized and capable of producing a future primrose. Covered with many protecting coats, it becomes a perfect seed. The original casket swells, hardens, is transformed into a rounded capsule or seed-vessel, opening by valves or a deftly constructed hinge.
Darwin, of plants which are more fertile with the pollen of another species than with their own; and there are others, such as certain fuci, whose male element will fertilize the ovule of a plant of distinct species, while the males of the latter species are ineffective with the females of the first.
The tube is nourished by the juices of the style as it goes along, and finally it gets to the ovary and the ovule. Every ovule has a tiny opening, or micropyle as it is called, and it is now easy to guess what that is for.
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