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.
Gametes are always haploid. Gametes should be haploid for maintaining the chromosome number of the species.This is achieved by meiosis the reduction division in germ cells. Meiosis is reduction division that occurs only in germ cells where gametes are produced with half the chromosome number to that of the parent cell.