Mitosis

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BioInteractive Search Results. Image of the Week The developing brain needs a constant source of new cells as it builds the circuits that will control behavior. Classroom Resource A chapter list to accompany the DVD. A text transcript of the 2006 Holiday Lectures on Science, Potent Biology: Stem Cells, Cloning, and Regeneration. To accompany the lecture series Potent Biology: Stem Cells, Cloning, and Regeneration. Click & Learn An exploration of current and future therapies. An overview and comparison of different regenerative capabilities in many different organisms. Lectures A discussion on policies and ethical issues associated with stem cell research. Finding factors to reverse age-related loss of cell maintenance, and some examples of stem cell therapies. In cloning, a cell's genetic machinery is reprogrammed. The role of stem cells in regeneration, and ongoing research to improve mammalian regeneration potency.

Series Video Clips Dr. Animation Human embryonic development depends on stem cells. Stem Cells and Diseases. The Promise of Stem Cells Studying stem cells will help us understand how they transform into the dazzling array of specialized cells that make us what we are. Some of the most serious medical conditions, such as cancer and birth defects, are due to problems that occur somewhere in this process. A better understanding of normal cell development will allow us to understand and perhaps correct the errors that cause these medical conditions.

Another potential application of stem cells is making cells and tissues for medical therapies. Today, donated organs and tissues are often used to replace those that are diseased or destroyed. Unfortunately, the number of people needing a transplant far exceeds the number of organs available for transplantation. Clinical Trials for Stem Cell Therapies Human embryonic stem cells: Scientists have been able to do experiments with human embryonic stem cells (hESC) since 1998, when a group led by Dr. Human induced pluripotent stem cells: Bone marrow stem cells: The Cloning Process. Mitosis (2) Mitotic Cell Division. Reproduction: One Goal, Two Methods. Screen 1: Elephant Herd (Image)© Paul Hampton—fotolia.com Screen 2: Gull with chick (Image)© Frans Lanting/Corbis Screen 4: Illustration of a Copy (Image)© 2010 JupiterImages Corporation Screen 5: Asexual Reproducers (Video)Adapted from Evolution: "Why Sex? " . © 2010, 2001 WGBH Educational Foundation and Vulcan Productions, Inc.

Screen 6: Parents with Kids on Shoulders (Image)© Andres Rodriguez—fotolia.com Screen 7: Why Sexual Reproduction? © 2010, 2001 WGBH Educational Foundation and Vulcan Productions, Inc. Screen 8: Reproduction—The Pros and Cons of Each Method (Document)King penguin image © Rich Lindie / fotolia.com © 2010 WGBH Educational Foundation.