In insects body fluids are are drawn into the?

valved ostia

Explanation:

In insects body fluids are drawn into the valved ostia. There are usually 13 pairs of ostia present. These are arranged with ostial valves. The valved ostia are  the openings located with the length of heart and aorta organ. The circulating fluid is known as haemolymph. The peristaltic movement causes haemolymph pumping. These originates from the posterior side of the insect body.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c