Chapter 3: Cells

• Cell theory helps us understand how living things are made up and organized
• The cell theory has three main ideas:

  • All living things are made of cells
  • Cells are the basic units that do all the work in living things
  • Cells can only come from other cells
• Key scientists involved in developing the cell theory:

  • Robert Hooke: Observed cork cells under a microscope and named them "cells"
  • Anton van Leeuwenhoek: Used a better microscope to see living cells like bacteria and sperm
  • Matthias Schleiden: Said that all plants are made of cells
  • Theodor Schwann: Said that all animals are made of cells
  • Rudolf Virchow: Showed that cells come from other cells
• The main purpose of the cell theory is to understand the structure and function of living things
• The cell theory helps us understand the organization of living things by providing a roadmap for understanding the structure and function of living things
• Cells are like little factories in living things because they carry out all the important functions in living things
• The cell theory is considered an important idea in biology because it provides a roadmap for understanding the structure and function of living things
• The cell theory is important in biology because it helps us learn about cells and how they work, guiding our understanding of living things