Woodpeckers with airbags in their heads, sea squids eat their own brains, giant squids eat food through their brains …
The brains of spiders are relatively large compared to the rest of the body, their brains are not only above the head but also distributed along the legs. The Smithsonian Institute for Tropical Research conducted a study and found that the central nervous system of the world’s smallest spiders made up almost 80% of their body cavity. Meanwhile, the human brain makes up only 2-3% of body weight.
2. Brain leeches
Although they have a complete body with eyes, brain, wings, muscles, intestines, and genitals, Megaphragma wasps are smaller than a single-celled amoeba (single-cell metamorphosis). Wasps have the smallest nervous system of all insects, researchers say. Some of the nerve cells that exist inside the hornet’s head grow outward as it matures because there isn’t enough room to store in its head. Fortunately, when grown outward, these nerve cells only last 5 days.
6. The sea squid eats its own brain
This organism clings to corals and filters food from seawater. A squid is a hermaphrodite, having male and female reproductive organs, which reproduce by releasing eggs and sperm into the water at the same time. After about 3 days, the eggs turn into tadpole-like larvae, dispersing in search of a site to grow.
They dive to the bottom and congregate in one place and live there for the rest of their lives. At this point, the squid begins to eat all parts of the body. It begins to “absorb” the eyes and the spine, and eventually it digests its brain ganglia, because once installed it no longer needs them.
7. Woodpecker with airbag in mind