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.
These are replaced at a rate of about 2 million per second (again, from wikipedia). There are 86,400 seconds in a day and so: (2 million x 86,400) + 50 to 70 billion = 222 billion to 242 billion cells produced every day by the average human body. Note, this is for the average adult. The rate of red blood cell production slows as you grow older. In order to understand this, we need to understand cell division.