Lesson 25 Cells Subtitle

ACTIVATOR Review List an organism and the eight characteristics of life it has List a non living thing and list the characteristics of life it lacks Question of the day: Are viruses alive? Explain. The Debate https://www.youtube.com/watch?v=VvTfkMhEw3g 5/23/2019 Add a footer

Cells Basic unit of life Form parts of an organism to carry out processes or functions Functions include: Breathing, getting rid of waste, eating, growing, etc One square centimeter of skin contains 100,000 cells 5/23/2019 Add a footer

First Observations of Cells 1590 microscope was made Robert Hooke 1660 built better compound microscope first to observe cells Looked at a thin slice of cork (bark of an oak tree) Anton van Leeuwenhoek Looked at swamp water and teeth scrapings Saw small moving organisms 5/23/2019 Add a footer

The Cell Theory states: Schleiden, Schwann, Virchow helped developed THE CELL THEORY The Cell Theory states: All living things are composed of cells Cells are basic unit of structure and function in living things All cells are produced from other cells 5/23/2019 Add a footer

Tiny structures inside the cells are called organelles Looking inside Cells Tiny structures inside the cells are called organelles Organelles carry out specific functions Two types of cells Prokaryotic Eukaryotic Plant and Animal 5/23/2019 Add a footer

Work in pairs to complete the article about the Cell Theory Classwork Work in pairs to complete the article about the Cell Theory 30 minutes then we will review as a class Keep the volume down, please and thank you 5/23/2019 Add a footer