In the electron transport chain, electrons move through the cytochromes in the following order: b566, b562, c1, c, a, and a3 (see Figure 16-19). The various cytochromes have slightly different heme groups and axial ligands, which generate different environments for the Fe ion (Figure 16-21).
On average, a woman has her period from three to seven days and the average woman menstruates from age 13 until age 51. That means the average woman endures some 456 total periods over 38 years, or roughly 2,280 days with her period -- 6.25 years of her life. Midol. You can only take up to six caplets a day, and cramps usually persist for two days. There are 40 caplets per package of Midol, which costs $8.99 at Walgreens.
A period is the part of the menstrual cycle when a woman bleeds from her vagina for a few days. For most women this happens every 28 days or so, but it's common for periods to start sooner or later than this, ranging from day 24 to day 35. Your period can last between three and eight days, but it will usually last for about five days. The bleeding tends to be heaviest in the first two days.