So, why does your stomach growl? In one word, peristalsis. It is triggered by appetite and even after you have eaten food. It is just much more noticeable when your digestive tract is empty. Click the link below to learn more about borborygimus and the whole digestive tract.http://health.howstuffworks.com/human-body/systems/digestive/stomach-growling1.htm
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In light of changes that have occurred that might have a lot of discussions around it, in school and out, please remember that you are my students, that the focus on class will be on biology and class will be like it always has been. I value every one of you and the varied perspectives that you bring to school related and life related issues. I hope that in the transition period this mutual respect shines through. I also hope that all of you guys- aka y'all, know how much it means to me to call you my students. The HL blog has extra credit on it that extend to all of you- extra credit animal costume still applies so please put your energies into something creative. http://www.bbc.com/news/science-environment-19848109 Mammoth carcass found in Siberia The carcass, discovered on Russia's Taimyr Peninsula, still has one of its tusks A well-preserved mammoth carcass has been found by an 11-year-old boy in the permafrost of northern Siberia. The remains were discovered at the end of August in Sopochnaya Karga, 3,500km (2,200 miles) northeast of Moscow.A team of experts from St Petersburg then spent five days in September extracting the body from frozen mud.The mammoth is estimated to have been around 16 years old when it died; it stood 2m tall and weighed 500kg.It has been named Zhenya, after Zhenya Salinder, the 11-year-old who found the carcass while walking his dogs in the area. Alexei Tikhonov, from the St Petersburg Zoology Institute, who led the team excavating the mammoth, said this specimen could either have been killed by Ice Age humans, or by a rival mammoth. He added that it was well preserved for an adult specimen. His colleague Sergei Gorbunov, from the International Mammoth Committee, which works to recover and safeguard such remains, said: "We had to use both traditional instruments such as axes, picks, shovels as well as such devices as this "steamer" which allowed us to thaw a thin layer of permafrost. "Then we cleaned it off, and then we melted more of it. It took us a week to complete this task." But several juvenile examples have come to light that are more complete. Earlier this year, a very well preserved juvenile mammoth nicknamed Yuka was unveiled by scientists. Found in the Yakutia region of Russia, it preserves much of its soft tissue and strawberry-blonde coat of hair. There were also signs from its remains that humans may have stolen the carcass from lions and perhaps even stashed it for eating at a later date. Related Stories |
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