What are the three main parts of a generalized human cell and their functions?

The three main parts of a generalized human cell are the plasma membrane, the cytoplasm, and the nucleus. The plasma membrane is the outer boundary and acts as a selectively permeable barrier. The cytoplasm is the intracellular fluid packed with organelles that perform specific cell functions. The nucleus is an organelle that controls cellular activities.

A generalized human cell has three major regions with distinct roles. The plasma membrane forms the cell's outer boundary and is selectively permeable, meaning it controls what enters and leaves the cell. The cytoplasm fills the space inside the plasma membrane and contains organelles, which are small structures that each carry out specific functions needed for the cell to work. The nucleus is typically located near the center of the cell and serves as the control center, directing cellular activities. Together these three parts carry out the common functions shared by all human cells.