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.
But the division only happens to specific cells in the body. Our cells need to grow. For it to grow, it needs to divide. When the cells are too large, they are not efficient anymore to do the needed tasks. Humans have almost 300 different types of cells and these must be useful for the human process to go on normally.ut the division only happens to specific cells in the body. Our cells need to grow. For it to grow, it needs to divide. When the cells are too large, they are not efficient anymore to do the needed tasks. Humans have almost 300 different types of cells and these must be useful for the human process to go on normally.