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.
Meiosis /maÉªËoÊsÉ¨s/ is a specialized type of cell division which reduces the chromosome number by half. This process occurs in all sexually reproducing single-celled and multi-celled eukaryotes, including animals, plants, and fungi.eiosis produces haploid gametes with one set of 23 chromosomes. When two gametes (an egg and a sperm) fuse, the resulting zygote is once again diploid, with the mother and father each contributing 23 chromosomes.