Do spiders have brains?

“We discovered that the central nervous systems of the smallest spiders fill up almost 80 percent of their total body cavity, including about 25 percent of their legs.” Some of the tiniest, immature spiderlings even have deformed, bulging bodies. The bulge contains excess brain. read more

Spiders technically do not have brains, just because of the way "brain" is defined by people who study anatomy. But they do have concentrations of neural cells that fill up most of the space in the cephalothorax. Jumping spiders, and maybe some others, have "brains" that extend down into the legs. read more

Spiders, like humans have the same basic bodily systems that we do however they do not work in the same way and are also arranged differently throughout the body. In spiders what is known as the cephalothorax contains the brain, stomach, eyes, and mouth and the abdomen contains the heart, digestive tract, reproductive organs and lungs. read more

Spiders have the same basic bodily systems as people, but they don't work in the same way and they're arranged differently in the body. The cephalothorax contains the brain, stomach, eyes and mouth, and the abdomen contains the heart, digestive tract, reproductive organs and lungs. read more