Why is a cell called the basic unit of life?

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

What are the two main phases of a cell cycle