Overview Rash from poison ivy. Many people develop an itchy rash that causes lines or streaks that look like this. Poison ivy, oak and sumac: Overview Many people get a rash from poison ivy, poison oak, and poison sumac. This rash is caused by an oil found in the plants. This oil is called urushiol (you-ROO-shee-all).
Cells in heart muscle process a lot of energy, so they have a large number of mitochondrion, the part of the cells where energy is made. Like all living things, cells die. The number of cells that an adult male loses per minute is roughly 96 million.
Half the chromosomes go to one end of the cell, and the other half go to the other end, at which point the cell splits in two. According to HowStuffWorks, human beings have 46 chromosomes or 23 pairs of chromosomes. During meiosis, which is similar to mitosis but occurs in sex cells, each new cell contains only 23 chromosomes.