Pauki

The spider reproduction organs are located in front of the spinning organs. Males have various ways to demonstrate a female individual that he is interested in mating. Males of some species offer a present, others “call” the female with their feet on the network, and some perform a dance. If the signals are correct and the female is ready for mating, she allows the gentleman to approach. Before mating, males fill the oblong bulbs (zimbiums) at the ends of Pedipalp with s***m, for which they create a small network. Then the males throw a few drops of s***m from the ge****ls onto the network and gain s***m into zimbiums.

I love this image.
The Hart tree in the Redwood Mountain Grove, Kings Canyon National Park, California. Photo: Jack Tumen

The respiratory system of spiders is quite peculiar. They have pulmonary bags that are similar to the pages of the book, as they have plates.