التناسل في العناكب .. كتاب في سبيل موسوعة علمية .. الدكتور أحمد ذكي

Reproduction in spiders

The spider thing in this is also strange.
Take the female, for example. It has two ovaries, it has an oviduct, and it has a uterus, even if it is very short, and it opens in the abdomen, at its bottom, between the two breathing holes that we mentioned.

Likewise, the male spider has two testicles and two pairs of ducts, like those that transport semen in humans, then to
Ejaculatory canal.

The meeting between the sperm and the female egg
Spiders are a special road, we are not interested in detailing it now.
But what is important is the general plan. Establish one in
Spiders and humans.

There is one thing in which male and female spiders differ
Male and female people:

The world of people is the world of men..
As for the world of spiders, the world of women.

In the world of spiders, there is no danger to the male except in fertilizing the egg, and then nothing after that. The female is the one who weaves a protective covering around the egg, and she is the one who takes care of her children. Male spiders have glands that secrete tissue, but they rarely weave. She hunts her catch alone. She is younger than her ego. Many males die after insemination.

(These are the glands inside the spider’s abdomen. They secrete a fluid that turns into threads of silk as soon as it touches the air. This fluid flows from the glands in channels that end at the single spindle with several thin tubes, which are the diaphragm tubes, magnified in the following image.)

(The spinning tube in which the duct ends, which carries the fluid from its glands to the air, which turns into threads when touched)

The female spider devours it. Women do not devour men. The happy ones are those that do not devour them.

Spiders have breasts like women's breasts, but they do not produce milk. Rather, they mature with soft silk

Finally, we come to the first characteristic of the spider, the one that almost belongs to it to the exclusion of any other animal on earth, which is the spider’s web.

-Spinners

Spiders have spindles located in the abdomen, at the back, and seen from below at the back. They usually have three or four pairs (see the attached figure).

Each of these spindles has several holes.
These holes are connected from the inside to glands that secrete a fluid that turns into silk once it touches the air. These holes are connected to the glands through channels.
These holes are connected from the outside to thin tubes
Very thin, like a hair, from which the silky fluid coming from the glands comes out through the ducts (see the attached figure).

In addition to the previous two forms, there is a third form, which is for the evaporative tube, and its connection from the inside to the channel carrying the liquid silk. It is a greatly enlarged form.

This device, which we call the spindle in a spider, is similar to the device we call the breast in a woman. This is because a woman’s breast is a nipple with ducts behind it that end in glands that make milk from blood. While spiders' spiders make silk.

They are blueprints in creation, their methods are the same, even
Even if their goals differ.

The woman makes milk, and it contains protein. Spiders make silk, which is made of protein.

The two proteins differed. Neither of them knows what protein is
Who makes. A protein made by a spider that lived a thousand years ago is a protein made by a spider today. A protein that a woman’s breasts made a thousand years ago is a protein that her breasts make today.

The spider creates, the breast creates what it creates, and man is incapable. Man continues to this day, and in the age of the atom
With all the equipment, materials, and tricks his chemical laboratories were full of, he was unable to synthesize a protein, with the exception of insulin, as the Chinese had created it not long ago.

Spider spinnerets have hundreds of spinning tubes

Spider spindles have a number of holes, and even a very large number of spinning tubes, sometimes reaching a thousand, but in other species the spinning tubes are less than a hundred.

The silk thread that usually comes out of these spinning tubes is very thin, its diameter is about three-tenths of a thousandth of a millimeter, or in other words, about 3,333 threads must be divided into one row for the length of the row to reach one millimeter. Silk is made for other purposes, so it is part of the finer and more delicate fabric.

As we spin cotton in our factories, we combine thread, thread, and thread, to produce a stronger thread, and we combine twisting between them, so that they are tightly joined, and we call this spinning. This is how a spider is made with its silk threads, and I do not know whether the spider learned from us, or whether the spider learned from us! Or do we both learn with those behind walls?