FC: Mitosis: The Journey of a Cell By: Rhi Brady | "Animal Cell Schematic."
1: In the beginning, we all start at a single cell. Some cells are so small that they are invisible to the human eye, like the human cell (top). Some cells are very large, like the chicken cell (bottom). Despite the many differences in cells, each cell undergoes the same process to become an organism. | "Animal Cell Schematic." | "Egg Yolk."
2: How do I go from a single cell to what I am today?!?
3: "Anatomy Illustration- major organs." | "Animal Cell Schematic."
4: How does an organism arise from a single cell? The journey to becoming an organism is complex, but it is predominated by a single process: Mitosis
5: Before the cell enters mitosis, it is in interphase. The cell spends most of its time in interphase. The cell is busy collecting nutrients in order to prepare for Mitosis. The DNA (deoxyribonucleic acid) is dispersed as chromatin during interphase. | Nucleus | Chromatin | "Mitosis Models."
6: The cell is now ready to enter mitosis!
7: Prophase | Two important things occur during prophase: 1.The chromatin condenses to form the chromosomes. 2.The nucleus of the cell disappears. | Chromosomes are beginning to form. | "Mitosis Models."
8: A human cell has 46 chromosomes! | Chromosome Composition | Each chromosome is comprised of 2 identical chromatids! | The chromosomes are homologus. This means that there are 23 pairs of chromosomes in a human cell. Each pair of chromosomes contains the same genes! | Centromere | Chromatid | "Chromosome."
9: Metaphase | Once the chromosomes have formed and the nucleus has disappeared, the cell can progress to the metaphase, the second stage of mitosis. | Next Stage! | During metaphase, the chromosomes line up along the Metaphase plate, which is along the center of the cell. | "Mitosis Models."
10: Anaphase | In this stage, the centromeres divide. This separates the chromatids that had originally made up the chromosome. | The individual chromatids are now called chromosomes.The chromosomes migrate to opposite sides of the cell. | "Mitosis Models."
11: Telophase | Telophase in the final stage of Mitosis. The most important event that occurs is cytokinesis. Cytokinesis is the division of cell into 2 identical cells. | "Mitosis Models."
12: Results: I cycle of mitosis produces 2 identical daughter cells. Each cell is a diploid cell, meaning that is has the full number of chromosomes. i.e. a human cell has 46 chromosomes in a diploid cell! | Wait! That still doesn't tell us how a human arises from a single cell! | "Animal Cell Schematic."
13: After the cell has finished telophase, it enters interphase once again. Here it can replace nutrients and other essential items. Once the cell it is ready it can begin mitosis again.
14: A human skin cell is 30 mircometers big! | Size Comparision: A dime is about 1 mm thick. A skin cell is ~1,000 times smaller than the width of a dime! | "Ruler." | "Toned Rooselvelt Dime 1948." | (University of Utah 2011)
15: Mitosis must occur over and over and over and over and over in order to create the amount of cells needed to sustain a grown human!
16: How many cells are required to support a full grown human? | "Iconscollection-Question."
17: 50 -100 trillion cells in the adult human body! | (Chudler 2006)
18: That's over 16,666 times more cells in one body than the number of people on the Earth! | WOW!!!
19: As the organism grows from a single cell into a complex multicellular organism, the cells differentiate into specific types of cells. For example: | Arms | Skin | Muscles | Organs | "Anatomy Illustration- major organs."
20: That is the end of the process of mitosis! However, mitosis is a process that never really ends because it must occur to replace body cells that have been damaged or have died during our lifetime. The End!
21: "Anatomy Illustration- major organs." Flickr. Retrieved on Sept. 22, 2011 from http://www.flickr.com/photos/combinedmedia/2036186009/sizes/m/in/photostream/. "Animal Cell Schematic." Flickr.Retrieved on Sept. 19, 2011 from http://www.flickr.com/photos/msitua/3246137819/sizes/l/in/photostream/. "Egg Yolk." Retrieved on Sept. 22, 2011 from http://www.flickr.com/photos/bsdubois00/2923049800/. "Iconscollection-Question." Flickr. Retrieved on Sept. 22, 2011 from http://www.flickr.com/photos/simiezzz/647478939/sizes/m/in/photostream/. | Citation Page | Next Page
22: Citation Page "Mitosis Models." Fickr. Retrieved on Sept. 22, 2011 from http://www.flickr.com/photos/40964293@N07/3893914290/. "Ruler." Flickr. Retrived on Sept.22, 2011 from http://www.flickr.com/photos/iliahi/408971482/. "Toned Rooselvelt Dime 1948." Retrieved on Sept. 22, 2011 from http://www.flickr.com/photos/pagedooley/866973661/.
23: Resources Consulted Chudler, Eric. "Questions." Neuroscience for Kids.2006