Lesson 7.10 The Origin of the Word Cell - A Story Where Life Begins PDF

The Origin of the Word “Cell”: A Story Where Life Begins Science 7 – Quarter 2 Lesson 2 Teacher: Mr. Jhon Ivan R. de Jesus Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow...

The Origin of the Word “Cell”: A Story Where Life Begins Science 7 – Quarter 2 Lesson 2 Teacher: Mr. Jhon Ivan R. de Jesus Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow Cork Preexisting cells Cytologists Antonie van Cells Dead cells Leeuwenhoek 1. ________ are the building blocks of life. Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow Cork Preexisting cells Cytologists Antonie van Cells Dead cells Leeuwenhoek 2. ______ was the scientist who discovered cells. Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow Cork Preexisting cells Cytologists Antonie van Cells Dead cells Leeuwenhoek 3. The first cells observed were ____ in thin slices of _____. Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow Cork Preexisting cells Cytologists Antonie van Cells Dead cells Leeuwenhoek 4. ____ was the first person who used a drop of pond water to observe the living cells. Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow Cork Preexisting cells Cytologists Antonie van Cells Dead cells Leeuwenhoek 5. One of the major theories in science states that cells come from _______. Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow Cork Preexisting cells Cytologists Antonie van Cells Dead cells Leeuwenhoek 6. The works of _____, _____, and _____ led to the development of the cell theory. Sci-Investigate Schleiden, Schwann, Robert Hooke Organisms Virchow Cork Preexisting cells Cytologists Antonie van Cells Dead cells Leeuwenhoek 7. _____ are the scientists who study cells. Sci-Talk 1. What does the phrase “building blocks” mean to you? How does it relate to cells? Sci-Talk 2. What do you think led early scientists to think that cells come from previously existing cells? Sci-Talk 3. Do you think that animal cells and plant cells exhibit the same cellular components? Explain. Cell Theory ✓Series of statements about the origin of the cell ✓First formulated in the mid- 19 century th Unified Cell Theory States that: 1. All organisms are composed of cells. 2. Cell is the smallest unit of an organism that can be considered living. Like a room in a monastery Antonie van Leeuwenhoek Antonie van Leeuwenhoek A day after Hooke’s discovery, a Dutch scientist observed protozoa and bacteria and called these tiny creatures “animalcules”. Antonie van Leeuwenhoek The first to perfect the microscope. Added a piece in the microscope that led to the magnification by around 200 to 300 times its original size. Observed spermatozoa in 1677. Observed plaque and concluded that there are little animalcules in it. Theodore Schwann and Matthias Schleiden Theodore Schwann and Matthias Schleiden German scientists who began studying plant and animal cells in the 19 century. th Schwann proposed the cell theory in 1839. Theodore Schwann and Matthias Schleiden Cell Theory: 1. All organisms are made of cells. 2. Cells are the basic units of life. Theodore Schwann and Matthias Schleiden Drawbacks: 1. Schwann claimed cells crystallize from the material of other cells. 2. Schleiden believed that cells grow through seeding. Rudolf Virchow Rudolf Virchow Proposed omnis cellula e cellula in 1855. Cells come from preexisting cells. Led to the discovery of DNA which is passed through the daughter cells and the flow of energy in cells. The Origin of the Word “Cell”: A Story Where Life Begins Science 7 – Quarter 2 Lesson 2 Teacher: Mr. Jhon Ivan R. de Jesus  hue kneel woe perfected the microscope  Which of these are contributions of Leeuwenhoek? Cell theory 200-300x mag Animalcules Cellulae  herb rook toe observed dead cells from a piece of cork  Hooke called the dead cells ??? “_________” ??? which means “_________” because it looks like the rooms in a monastery where he used to live. channeled sands winch formulated the cell theory What are the two statements in the cell theory? child furor vow proved cell division: cells came from preexisting cells  Virchow proved the cell division and stated that “All cells come from cells” which when translated to Latin is ??? cellula e _______. ______ ??? Parts of the Cell Parts of the Cell Controls what enters and leaves the cell Parts of the Cell Control center of the cell Parts of the Cell Organelle that makes proteins Parts of the Cell Organelle that packages proteins Parts of the Cell Breaks down old cell parts, also called as “suicidal bags of the cell” Parts of the Cell Stores water and/or waste Parts of the Cell Provides energy for the cell, also called as “Powerhouse of the cell” Parts of the Cell Transport system in a cell Parts of the Cell Contains the genetic information Parts of the Cell Controls what enters and leaves the nucleus Parts of the Cell  My Cell City vacuole lysosome ribosome ER mitochondria Golgi body nucleus Cell membrane Animal Cell vs Plant Cell Animal Cell vs Plant Cell Looking at Cells 1. What is the shape of the animal cell? 2. What is the shape of the plant cell? 3. How do the unique characteristics of animal cells help them to function? How about for plant cells? The Origin of the Word “Cell”: A Story Where Life Begins Science 7 – Quarter 2 Lesson 2 Teacher: Mr. Jhon Ivan R. de Jesus