Timmy Bustard: Well; You could check out these websites: http://wiki.answers.com/Q/Explanation_on_how_the_h...http://www.sads.org.uk/heart_function.htm
Shamika Schools: the heart bumps blood around the body THE END!!!!
Georgina Natal: hmm.....interestingor mb just a coincidence.......but, at my school dat is wat we are doing too, and we have a test on it, i wonder if i noe you?if i noe you, or you go to my school, you would noe wat i am talking about when i say, "hey, do u lyk Ms Thompson?"ok, yes, i will answer ur question:the heart pumps blood around the body, and nerve impulses generated within the heart trigger each beatthe heart is a cardiac muscleand the atrium is where the blood enters the heartand da ventricle is hwere the blood is pumped out of the heartand the walls of the ventricles are thicker because they have to pump blood all around to your body, where as the atrium only has to pump blood to the lungsyou should google images "! structure of heart" and you will get a couple of diagramsor you could look in ur science textbooki hoped this helped, i'm wondering if you are in my class, cos we have a science test on dis stuff 2morrow....hmmmmm...Show more
Derrick Cacioppo: Hi ^_^,hm...i don't think i go to your school. i don't know anyone called miss thompson but i do have a teacher: mr thomas. yeah, i know, weird lol. thnx for answering my question though, good luck on your test.
Mohamed Szollosi: The heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body. It usually beats from 60 to 100 times per minute, but can go much faster when necessary. It beats about 100,000 times a day, more than 30 million times per year, and about 2.5 billion times in a 70-year lifetime.
Walter Scordino: simple structure ?:http://www.perthcardio.com.au/images/ratrium.jpg
Providencia Jalbert: The heart is a pump with 4 cha! mbers. Top 2 are called the atria and the bottom two are calle! d ventricles (left & right). The heart is the main engine drive for delivering blood with oxygen and all the required nutrients around the body via the arteries and the veins return used/depleted blood back to the heart. The blood returned by the veins is sent first to the lungs to exchange carbon dioxide for oxygen, the newly oxygenated blood comes back to the heart ready to be pumped out to the rest of the body. If you look at the four chambers you can see the left ventricle has far thicker walls than all the other chambers. That is because this is the chamber that pushes/pumps the oxygen rich blood to the body, the right ventricle is not as thick because it only delivers to the lungs, a much shorter journey. The heart then is basically a large muscle, but the muscle fibres are highly specialised because they work by conducting electrical impulses, that conduction is what synchronises the pumping action and creates a recognised and audible rhythm, lub-dub lub-dub etc at a! round 70 beats per minute. Using special electrodes we can see the rhythm shows a special pattern and these (ECG's) can be used to diagnose problems with the heart as well as pictures/scans of the heart. I hope this helps but next time start your homework earlier and use textbooks provided....Show more
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