نمنن — 6-topic bundle

Cells are the fundamental units of all living things. Some organisms, like bacteria, are just a single cell, while others, like us, are made of trillions of cells organized into tissues, organs, and systems. Despite their vast differences, all cells share some common features and are built from similar chemical components.

There are two main types of cells:

Prokaryotic cells are the oldest and simplest forms of life on Earth. They include bacteria and archaea. Unlike eukaryotic cells (which make up plants, animals, fungi, and protists), prokaryotes don't have a nucleus to house their genetic material or other specialized compartments called organelles surrounded by membranes.

Here's a breakdown of their main parts: