1. (7th) Chapter 3-1 Cornell Notes
Discovering Cells

2. (7th) Chapter 3-1 Cornell Notes
Key Questions
1. What are cells?
2. What is the cell theory?

3. Chapter 3-1: Key Terms cell- cell theory- unicellular- multicellular-
tissue-
organ-
organ system-

4. Chapter 3-1 Part 1
cells: units of structure and function in living things;
most cells microscopic.

5. Chapter 3-1 Part 2 microscope: now possible to observe/study cells;
Robert Hooke: coined the term “cells”;
Anton van Leeuwenhoek: studied cells, coined term “animacules”.

6. Chapter 3-1 Part 3 1. Matthias Schleiden: all plants made of cells;
2. Theodor Schwann: all animals made of cells;
3. Rudolf Virchow: new cells come from old cells;
1, 2, 3 + others formed cell theory;
cell theory:
All living things made of cells;
Cells basic unit of structure and function;
All cells produced from other cells.

7. Chapter 3-1 Part 4 unicellular: composed of only 1 cell;
multicellular: composed of many cells.

8. Chapter 3-1 Part 5
multicellular organisms: cells to tissues to organs to organ systems;
tissue: group of similar cells working together for specific function;
organ: made of different kinds of tissues working together for specific functions;
organ systems: group of organs working together for specific functions.