Why take the first cockroach is alive?

This hated animal has a very strong survival instinct. First loss, but they still live weekly. Scientists have discovered why they do it, and people don't.

Why can cockroaches live even when they have . lost their heads?

Biophysiologist and biochemist Joseph Kunkel, from Amherst University, Massachusetts (USA), studied the development of cockroaches to find out the cause of cockroaches for head loss, and find out why humans do not can do that.

First, the loss of head in humans results in blood loss and blood pressure dropping to the point that it is impossible to transport oxygen and nutrients to body tissues. "People lost blood and died, " Kunkel commented.

In addition, humans breathe through their mouth or nose and the brain controls these vital functions , so when the head is lost, breathing stops. Moreover, the human body cannot be eaten without its head, ensuring a certain hunger .

However, cockroaches are not required to have blood pressure in a human way."They don't have the same vascular network as ours - meaning tiny circuits need high pressure so blood can flow. They have an open circulatory system, with much lower pressure."

"If you cut their heads, the neck will be sealed with blood. There is no bleeding control here , " Kunkel said.

This creature also takes air by breathing holes , lying on the body burns. In addition, cockroach's brain does not control this breathing process and blood does not need to carry oxygen to feed the organs. Instead, breathing holes draw air directly into the tissues through a series of small tubes called trachea.

In addition to the above factors, cockroaches are also a cold-blooded creature , meaning they need much less blood than human life. " An insect can survive every week with a meal they have," Kunkel said.

Entomologist Christopher Tipping at the Delaware Valley University in Doylestown experimented with cutting off the heads of two American cockroaches, "very carefully under a microscope", and healing wounds with wax, preventing them from dying from the loss of fluid. . As a result, two animals extend their life by several weeks in a vase. "They stand, touch and move."

Not only did their bodies survive without their heads, the cockroaches themselves survived , waving their whiskers a few hours before losing their water. If fed and cooled, it can live longer.

Some other amazing information:

1. Cockroaches were present on Earth since dinosaurs, their bodies were about 50cm long then !!! Today, tropical cockroaches even grow to 18cm.
2. There are about 4000 different species of cockroaches worldwide, but only 30 species prefer to live in your wardrobe.
3. Cockroaches keep breathing for 40 minutes.
4. They can run at a speed of 5 km / h, very impressive considering the small body (if they are as big as a human, the speed will be equivalent to 700 km / h !!!). Not only that, cockroaches also have the ability to change direction 25 times a second - really 'turning like a pinwheel'.
5. Some females only mate once and can continue to have a lifetime of pregnancy.
6. Cockroaches and scorpions are the only two species of creatures that can survive atomic testing.