Why do spiders shrink into a ball immediately after they die?

Spiders themselves have no muscles, and they all walk by hydraulic system (the hydraulic pressure of body lymph). When spiders die, their hydraulic system will naturally disappear and shrink into a ball. Most insects die straight, as if they were scared to death in an instant. Why do spiders shrink into a ball after death? The reason why they shrink into a ball is because spiders' feet have no muscles. If it relies on the brain to maintain its movements, it will quickly shrink into a ball after death.

Spiders are different from other insects. Their feet have no muscles, and they will change without brain control? Waste?

The death of most insects will directly harden the whole body. There are really not many insects that die and huddle in nature, and spiders are one of them. Spiders huddle up because their feet have no actual muscles. Usually, their movements are driven by the lymphatic hydraulics of the body, which means that their feet are not their own without the control of the brain. When the spider dies, the hydraulic system loses contact, just like a deflated balloon, it will slowly shrink back to its original appearance. Most spiders seen in life shrink into a ball and die.

Second, the spider's feet have no muscles, and the hydraulic system will be affected by other factors, shrinking into a ball or not? Spread your limbs?

When we notice the spiders around us, we will find that not all spiders will curl up and die, yes, because the hydraulic system is random. The hydraulic system does fail after the spider dies, but whether the spider's feet shrink into a ball or grow up is related to the spider's environment. If the spider is in a relatively dry and hot place, the hydraulic system that loses water will immediately shrink the spider's feet into a ball, which has become a common one. Tuo? Dead spider. If a spider dies in the water, we will find that its feet will slowly open. Has the spider come back to life? No, it's just that their hydraulic system is full of people and open. When a spider dies, it won't come back to life.

The failure of the hydraulic system will make the spider's feet shrink or grow according to the environment.