Chapter 3 Section 1 Continued

Recite Vocabulary Cell Cell Cells are the basic units of structure and function in living things. Cells are the basic units of structure and function in living things.

Recite Vocabulary Cell Theory Cell Theory Cell theory states the following: Cell theory states the following: All living things are composed of cells. All living things are composed of cells. Cells are the basic units of structure and function in living things. Cells are the basic units of structure and function in living things. All cells are produced from other cells. All cells are produced from other cells.

Recite Vocabulary Unicellular Unicellular Unicellular organisms are single-celled organisms, including bacteria; the most numerous organisms on Earth. Unicellular organisms are single-celled organisms, including bacteria; the most numerous organisms on Earth. Multicellular Multicellular Multicellular organisms are composed of many cells. Multicellular organisms are composed of many cells.

Recite Vocabulary Tissue Tissue A tissue is a group of similar cells that work together to perform a specific function. A tissue is a group of similar cells that work together to perform a specific function. Organ Organ An organ is made up of different kinds of tissues that work together. An organ is made up of different kinds of tissues that work together. Organ System Organ System An organ system is a group of organs that work together to perform a major function. An organ system is a group of organs that work together to perform a major function.

First Observations of Cells The invention of the microscope made it possible for people to discover and learn about cells. The invention of the microscope made it possible for people to discover and learn about cells. Robert Hooke and Anton van Leeuwenhoek built their own microscopes. Robert Hooke and Anton van Leeuwenhoek built their own microscopes. Discovering Cells

Discovery of the Cell What was Robert Hooke’s contribution to the study of cells? What was Robert Hooke’s contribution to the study of cells? Hooke was one of the first people to observe cells. He gave them their name. Hooke was one of the first people to observe cells. He gave them their name. What did Anton van Leeuwenhoek use his microscope to study? What did Anton van Leeuwenhoek use his microscope to study? Lake water, scrapings from his teeth and gums, water from rain gutters, and tiny moving organisms that he named animalcules. Lake water, scrapings from his teeth and gums, water from rain gutters, and tiny moving organisms that he named animalcules.

Discovery of the Cell How did the invention of the microscope help advance the study of life science? How did the invention of the microscope help advance the study of life science? The invention of the microscope made it possible to discover and learn about cells. The invention of the microscope made it possible to discover and learn about cells. Why do you think people were so interested in seeing Hooke’s drawings? Why do you think people were so interested in seeing Hooke’s drawings? They were drawings of things that up until then had been invisible, so the book opened up a whole new world to people. They were drawings of things that up until then had been invisible, so the book opened up a whole new world to people.

Discovery of the Cell How did each advance influence the next scientist’s work? How did each advance influence the next scientist’s work? The work of each scientist built upon the work and knowledge of the previous scientist. The work of each scientist built upon the work and knowledge of the previous scientist. Which type of microscope – simple or compound – did Leeuwenhoek make and use? Which type of microscope – simple or compound – did Leeuwenhoek make and use? Leeuwenhoek made and used a simple microscope. Leeuwenhoek made and used a simple microscope.

Development of the Cell Theory Even after Hooke viewed cork cells, scientists still did not understand cells and their importance. Even after Hooke viewed cork cells, scientists still did not understand cells and their importance. How did Schleiden, Schwann, and Virchow contribute to the understanding of cells? How did Schleiden, Schwann, and Virchow contribute to the understanding of cells? Hooke observes cork Leeuwenhoek observes living organisms. Schleiden concluded that all plants are made of cells. Schwann concluded that all animals are made of cells. Virchow proposed that all new cells are formed from existing cells.

Development of the Cell Theory What is the cell theory? What is the cell theory? The cell theory is a widely accepted explanation of the relationship between cells and living things. The cell theory is a widely accepted explanation of the relationship between cells and living things. The cell theory states the following: The cell theory states the following: All living things are composed of cells. All living things are composed of cells. Cells are the basic units of structure and function in living things. Cells are the basic units of structure and function in living things. All cells are produced from other cells. All cells are produced from other cells.

Development of Cell Theory Why do you think it took almost 200 years after cells were discovered for scientists to conclude that all living things consist of cells? Why do you think it took almost 200 years after cells were discovered for scientists to conclude that all living things consist of cells? Figure 3: Where do the cells of the caterpillar and leaf come from? Figure 3: Where do the cells of the caterpillar and leaf come from?

Scientists Song (Tune of Bingo) A scientist named Robert Hooke looked under a microscope. In 1663, he looked at a slice of cork. He saw many tiny rooms and he called them cells! A guy named Anton van Leeuwenhoek built simple microscopes. Drops of lake water, scrapings from teeth and gums, water from rain gutters. He saw “animalcules”!

Almost 200 years later, three scientists kept working. First there was Schleiden who said that all plants have cells. Schwann said, “So do animals!” All living things have cells. Last came Rudolf Virchow who made a great conclusion. He said that all cells come from existing cells. These three guys helped the world discover cell theory!

Scientists Song (Tune of Bingo) Short Version Robert Hook observed some cork. Leeuwenhoek looked at living things. Shleiden said, “All plants have cells.” Schwann said, “Animals too!” Virchow wrote, All cells come from other cells.

Unicellular and Multicellular Is the actual dog larger or smaller than the picture? Is the actual dog larger or smaller than the picture? Are the bacteria larger or smaller than the picture? Are the bacteria larger or smaller than the picture?

Unicellular and Multicellular What is a tissue? What is a tissue? A group of similar cells that work together to perform a specific function A group of similar cells that work together to perform a specific function What are different types of tissues working together called? What are different types of tissues working together called? An organ An organ

Unicellular and Multicellular What is an organ system? What is an organ system? A group of organs that work together to perform a major function A group of organs that work together to perform a major function Do bacteria have organs? Do bacteria have organs? No; they are unicellular and organs contain many cells. No; they are unicellular and organs contain many cells. Many CelledUnicellular

Awards Ceremony In groups of five, present a speech for a scientist you are giving an award to. In groups of five, present a speech for a scientist you are giving an award to. Speeches must be seconds long. Speeches must be seconds long. Must include the scientists name and why he is getting an award. Must include the scientists name and why he is getting an award. All members of your group must give part of the speech. All members of your group must give part of the speech. You have 5 minutes to create and practice your presentation. You have 5 minutes to create and practice your presentation.

Homework Workbook Page Workbook Page Sing the Scientist Song - LOTS Sing the Scientist Song - LOTS Review Chapter 3 Section 1 Review Chapter 3 Section 1 The warm ups next class will be about this section. The warm ups next class will be about this section.