Another useless fact about spiders - this is WHY they can only run for up to 13 seconds:
As we all know, a spider body is compartmentalised into the head, thorax and abdomen. The spider's heart is in the abdomen, and the legs join the body at the the thorax. The legs work on hydrostatic pressure, but the internal pressure created when the spider is running around would result in the heart exploding so to stop this happening, the spider 'locks off' the abdomen. This also has the effect that the legs can only work for a certain time before getting tired, because the heart is locked out and can't oxygenate them.
Why can I remember things like that, but I can't remember to pick up an extra pint of milk at the supermarket? Now there's something that needs more research...
As we all know, a spider body is compartmentalised into the head, thorax and abdomen. The spider's heart is in the abdomen, and the legs join the body at the the thorax. The legs work on hydrostatic pressure, but the internal pressure created when the spider is running around would result in the heart exploding so to stop this happening, the spider 'locks off' the abdomen. This also has the effect that the legs can only work for a certain time before getting tired, because the heart is locked out and can't oxygenate them.
Why can I remember things like that, but I can't remember to pick up an extra pint of milk at the supermarket? Now there's something that needs more research...
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