The concept of mitosis and cytokinesis is a scientific principle used with stretching and tension-based devices such as the X4 Labs Penis Stretcher and the Euro Extender Penis Enlargement Device.

Mitosis is the process in which a eukaryotic cell separates the chromosomes in its cell nucleus, into two identical sets in two daughter nuclei.

It is generally followed immediately by cytokinesis, which divides the nuclei, cytoplasm, organelles and cell membrane into two daughter cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic (M) phase of the cell cycle - the division of the mother cell into two daughter cells, genetically identical to each other and to their parent cell.

Mitosis divides the chromosomes in a cell nucleus. Mitosis occurs exclusively in eukaryotic cells, but occurs in different ways in different species. For example, animals undergo an "open" mitosis, where the nuclear envelope breaks down before the chromosomes separate, while fungi such as Aspergillus nidulans and Saccharomyces cerevisiae (yeast) undergo a "closed" mitosis, where chromosomes divide within an intact cell nucleus. Prokaryotic cells, which lack a nucleus, divide by a process called binary fission. The process of mitosis is complex and highly regulated.

The sequence of events is divided into phases, corresponding to the completion of one set of activities and the start of the next. These stages are prophase, prometaphase, metaphase, anaphase and telophase. During the process of mitosis the pairs of chromosomes condense and attach to fibers that pull the sister chromatids to opposite sides of the cell.

The cell then divides in cytokinesis, to produce two identical daughter cells. The practice of a Penis Enlarger device can only work with cytokinesis and mitosis, as cell division and multiplication is the basic scientific principle used in penis enhancement sciences. Historically speaking, blood and skin cell enlargement has been used by several tribes and cultures around the world. It is only recently that this penile stretching and jelqing secrets have been revealed to North American culture.

The X4 Labs Penis Extender and the Euro Extender use the basic principles of mitosis for penis enlargement procedures. While normally this process is done surgically, the use of a penis stretcher permits this process to work with the concept of tension and jelqing.

Some may believe this process could be painful, however it is not thanks to the X4 Labs Dual Hybrid Support System. This system offers users the choice between using the hybrid support piece to use either comfort straps, silicone tubing, or both during the penis enlargement treatment.

For those who prefer to use silicone tubing, the Euro Extender is the penis enlargement device to use for the enlargement treatment. For men suffering from Peyronie's disease, using a medical penis stretcher can be the most beneficial alternative to the painful surgery some people undergo. The beauty of the X4 Extender is that sometimes people may get sick of using the silicone tubing and usually want to switch to the comfort straps. The hybrid support piece is only offered on the X4 penis enlargement devices. These brands of penis extenders are compatible with most penis enlargement devices.

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Watch how Mitosis works!