â¢ The cell cycle is a series of events that takes. place from one cell division to the next. â¢ The time is takes to complete a cell cycle is. not the same in all cells.
A neuron is a nerve cell. The brain is made up of approximately 100 billion neurons. Neurons are similar to other cells in the body in some ways such as: Neurons are surrounded by a membrane. Neurons have a nucleus that contains genes. Neurons contain cytoplasm, mitochondria and other organelles.
Not one [of the brains] that we looked at so far has the 100 billion. Even though it may sound like a small difference, the 14 billion neurons amount to pretty much the number of neurons that a baboon brain has, or almost half the number of neurons in the gorilla brain.