A) Growth plate and Endochondral ossification: In order to maintain a healthy skeletal system which is crucial for different organs such as respiratory system‚ brain‚ spinal cord and heart‚ it is very important to have a good development of the skeletal system. Endochondral ossification is the process through which the axial and appendicular skeletons are formed through the formation of a cartilage inter-mediate. A good model for endochondral ossification is the limb bud where the precursor cells
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There are no multicellular plants in the oceans Most are photosynthetic single cells Cambrian is in Paleozoic era Called Cambrian explosion‚ because in this 70 million years. We have an explosion of every multicellular organism. Wednesday October 31st‚ 2012 CAMBRIAN Phanerozoic Eon Eras: Paleozoic (most recent : 550 Ma until now) – multicellular organisms in the oceans The periods in the Paleozoic era are: Cambrian Ordovician: end is one of the 5 mass extinctions. So many organisms
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Stem Cell Research: Should we continue to allow scientists to create new embryonic stem cell lines? Good morning everyone. The topic of Stem Cell Research has been argued over by politicians‚ scientists and people all over the world for over a decade. Scientists should not be allowed to continue to create new embryonic stem cell lines. One of the ways to obtain stem cells for scientific research is to destroy a blastocyst (laboratory-fertilized human egg). Destroying the blastocyst is the equivalent
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I. Platyhelmithes Kayla Smith A. Structure and Function of Flatworms Period 2 1. Flatworms are the simplest animals with bilateral symmetry. 2. The tissues in bilaterally symmetrical animals develop from three germ layers: Ectoderm‚ Mesoderm‚ and Endoderm. 3. In flatworms‚ the layers are pressed against one another to form a solid body. 4. Because flatworms do not have a hollow body cavity between the endoderm and mesoderm‚ they
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Cord Blood Cells. Today medicine has reached great success in the treatment and prevention of many illnesses. Currently‚ scientists and doctors are paying more attention to technology of cells. Cord blood is the blood that remains in a newborn’s umbilical cord after birth. Cord blood‚ like bone marrow‚ is an invaluable source of a type of stem cell that can be used in a variety of medical treatments. New parents now have the option of taking an active role in treating future illness much like a
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Abstract Damaged cardiac tissue will have long term effects on overall cardiac function and right now if cardiac tissue becomes necrotic there is no guaranteed recovery of the tissue. Although studies are being done to explore possibilities in regenerating new cardiac cells to replace the damaged cells. Since 1956 experimenting with multiple types of stem cells have resulted in various amount of outcomes in improving cardiac function. Stem cell therapy has not yet been perfected and still have unanswered
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Embryonic Stem Cell Research is an important process that is already allowing scientists to test new drugs and figure out the cause of birth defects. The process is very delicate because scientists must work with a four to ten day old blastocyst to get the stem cells. They put the stem cells into a petri dish along with proteins and enzymes. The stew of cells‚ enzymes‚ and proteins is what helps regenerate the bad tissues that cause diseases. “Blastocysts can also potentially be created from a donor
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In recent years past‚ Embryonic Stem Cell research has caused a moral and ethical debate. In order To obtain embryonic stem cells‚ an early embryo has to be destroyed. To most people this act would seem highly unethical as you are potentially destroying new life. But others argue that the early stages of an embryo lack the physical mental and emotional capabilities of a human being‚ as well as most embryos being harvested have had yet to attach to the uterus in order to further develop. In addition
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EEGs Clinical psychologists and neuroscientific researchers have always sought to understand what is going on in the brain and what is on the mind of their clients. For centuries‚ direct examination of the brain was elusive and almost nearly impossible due to the inadequacy of technology. However‚ noninvasive advances in brain examination have alleviated those challenges‚ making it possible to explore and investigate the brain in depth. Electroencephalography (EEG) is used to monitor and test electrical
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1. Ovum a. Definition: the female reproductive cell that is capable of developing into a new member of the same species after fertilization. It is also called the egg. b. Structure: It is large in size (as large as a sesame seed). It is one of the largest cells in the human body. It is a spherical cell. It is not mobile (static). c. Function: It carries the set of chromosomes contributed by the female. It creates a good environment for the fertilization of the sperm. It also provides nutrients for
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