BIOLOGY - Cells - What Are Cells

Cells are the fundamental building blocks of all living organisms, from simple bacteria to complex humans. They vary in size and function, with some visible to the naked eye, like a chicken egg yolk, and others requiring a microscope. The human body contains around 50 trillion cells, each performing specific tasks. While some cells operate independently, most work together in multicellular organisms to perform complex functions, such as heart cells pumping blood. Understanding cells' diversity and roles is crucial to comprehending life itself.

What is a cell and how is it similar to a room in a house?

Approximately how many cells are there in the human body?

What are some common jobs that all cells perform?

Can you give examples of specific jobs that certain types of cells perform?

How do cells in a multicellular organism work together?