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.
Discovery of Reduction Division. Sexual reproduction. does not increase chromosome number because gamete. production by meiosis involves a decrease in chromosome. number. Individuals produced from sexual reproduction. inherit chromosomes from two parents. 12.2 Meiosis has three unique features. Unique Features of Meiosis. Three unique features of. meiosis are synapsis, homologous recombination, and. reduction division.