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.
Introduction All living things must reproduce to survive. All body or somatic cells reproduce by mitosiswhich is simple cellular reproduction. All sex cells must reduce their chromosome number as they divide. This reduction division is called meiosis and changes the chromosome number from Diploid, 2n, to Haploid, n. Each offspring resulting from the combination of haploid sex cells will contain the same chromosome number as their parents.