An Invacare Perfecto 2 oxygen concentrator. Portable oxygen concentrator (or POC) is a portable device used to provide oxygen therapy to patients at substantially higher oxygen concentrations than the levels of ambient air.It is very similar to a home oxygen concentrator, but is smaller in size and more mobile.n Invacare Perfecto 2 oxygen concentrator. Portable oxygen concentrator (or POC) is a portable device used to provide oxygen therapy to patients at substantially higher oxygen concentrations than the levels of ambient air.
Meiosis is the way sex cells are produced. Each sex cell (in a human) has 23 chromosomes, so if you like, meiosis reduces the number of chromosomes in the cell by a half. A be â¦ tter way of putting this is when the producing cell divides, it splits its chromosomes into two, passing one half onto each new cell, rather than replicating itself.
Report Abuse. Meiosis reduces the number of chromosomes in the reproductive cells (gametes) to half the usual number. Then when two gametes join together, the usual number of chromosomes is regained.ecolink Â· 8 years ago. Thumbs up.his means that each cell only ends up with half of the original amount of dna it had to start off with. then when the egg is fertilized by a sperm, the two halves come together and make one diploid (or full amount of chromosomes) cell. this is why you get half of your dna from your mom and your dad.