How many hearts does a squid have? Detailed answer

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How many hearts does a squid have? Detailed answer

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How many hearts does a squid have?

Squids, like some other cephalopods (octopuses and cuttlefish), have three hearts. The main one beats 30-36 times per minute and drives blood through the body, while the other two, additional ones, push it through the gills.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

What is industrial diamond?

The only difference between an industrial diamond and any other is that it is of a lower quality. If a diamond is of impeccable quality, beautiful, without a single speck, color, then, of course, it will be used in jewelry, where a higher price will be given for it.

It may come as a surprise that something as valuable as a diamond is used in industry at all, but the diamond is called the "King of Industry"!

The Greeks called the diamond "adamas", which means "invincible". A diamond is truly invincible as nothing in the world can cut it apart - except another diamond! Therefore, three-quarters of all mined diamonds do not go to jewelers at all. They are used in industry. And they are used because of their extreme hardness.

For example, about 20 percent of diamonds go to rig heads that are used to drill into rock. Diamonds are ground into a powder and this diamond powder is used for grinding wheels on which diamonds are processed. Some diamonds are used in metalworking. Without diamonds, some of the most important industries would not be able to operate.

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Random news from the Archive

ISSATA LED drivers for Armstrong luminaires 16.06.2016

ISSATA Limited has developed two models of power supplies for Armstrong and similar luminaires, which meet Russian regulatory requirements for light ripple factor and have power factor correction (PFC).

New models of power supplies IS 35GM-350 and IS 50GM-350 have an output power of 35 and 50 W, respectively, and an output current of 350 mA; the output current ripple is less than 1% and the power factor is >0,95.

The power supplies implement a circuit to reduce the inrush current, which does not exceed twice the average current consumption. The low value of the inrush current allows you to connect a large number of fixtures to one group line and use circuit breakers recommended by the PUE with characteristic C to protect it. In this case, false trips of the switch will not occur at the moment the lighting is turned on.

The power supplies are operable in the temperature range -15°C...+45°C at an input voltage of 176-265 V, there is a complex of protections against short circuit, overload and overheating. The products are characterized by high reliability and have a price that allows them to successfully compete with the most common similar products on the Russian market. Using these drivers with an emergency power supply, you can make emergency lighting fixtures.

Main technical parameters of IP IS 35GM-350, IS 50GM-350:

Output power: 35W
output current; 350 mA
Output voltage range: 40-100V, 70-140V
Output current ripple: less than 1%
Power factor: not less than 0,95
Input voltage range: 176-265V (AC)
Efficiency: not less than 88%
Starting current: not more than 0,3 A, 0,53 A
Overall dimensions (LxWxH): 215x30x25 mm, 209x39x29 mm

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