Some cell types have the ability to quickly change the consistency of their cytosol, generating internal flows that allow the cell to change shape and move. This type of cell movement, present in many protozoa and some cell types of multicellular animals, is called amoeboid movement.

Trichomoniasis is a type of infection of the vagina and penis. It is a sexually transmitted disease that can be treated and does not cause any serious health problems. There is a microorganism called Tricomonas vaginalis that causes the infection. Sex partners who do not use condoms can spread the microorganism through secretions.

Groundwater, formed by the infiltration of rainwater into the soil, which occupies its pores and rock crevices. This water seeps into the soil until it reaches a layer of impermeable material. Next Contents: The Planet Inside and Out

Force weight It is the force with which the earth attracts the bodies. When a body is in free fall, it increases approximately 10 m / s every second. As we have seen, the magnitude that measures the variation in body velocity as time goes by is acceleration. We have seen that the acceleration of gravity has a value of: The value of the acceleration of gravity is not the same for all the stars in the universe.

The deserts have a very varied location and are characterized by very sparse vegetation. The soil is very arid and the rainfall is low and irregular, below 250 mm of annual water. During the day the temperature is high, but at night there is rapid heat loss that radiates into the atmosphere and the temperature becomes excessively low.

There are various techniques for preserving foods so that they do not spoil, lose their nutritional value, or undergo any kind of alteration. The main ones are: boiling, cooling / freezing and dehydration. Boil Cooked foods stay longer than raw foods, because boiling kills the microorganisms contained in the food.