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Celebrate Valentine's Day with a quick study of the human heart and its functions.
Here are some 'heart felt' questions to test your students' knowledge. Give this as a fun pop quiz and hand out candy hearts for those that get perfect scores!
Also, check out these great heart related products form WARD'S to add to your class!» How big is the average heart?
About the size of a fist, weighting 300 grams.» How often does your heart beat?
The average is around 72 beats per minute for adults and 90 to 120, for kids.» Name the path blood takes though the heart.
From the body, right atrium, right ventricle, to the lungs, left atrium, left ventricle back to the body.» On average, how many times does your heart beat a day?
Have them do the math! (103,680 beats for adults and between 129,600 and 172,800 beats for kids.» How much blood do we have?
On average, about 5.6 liters. In the average lifetime, a heart will pump the equivalent of 1 million barrels (3 supertankers full) of blood.» What is the largest artery in the human body?
The aorta is almost the diameter of a garden hose. Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair.
As a special offer for our newsletter subscribers, get 10% off this week's featured products and free shipping on online orders over $100. Offer good until February 15, 2005. See below for additional details.
Featured Heart Related Products:
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Basic Heart Model
» Colorful, durable and economical. » Basic heart mode features both external and internal components, including valves. » It comes with a key identifying 37 structures.   More Sale Products > |
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Functional Circulatory System Model » Show the circulatory system in action by pumping dyed liquid through the four-chambered heart and plastic “vessels.” » The venous tubing is tinted blue to differentiate between oxygenated and nonoxygenated blood. » Includes a teacher's guide, dye, and a syringe to refill the system. More Sale Products > |
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Circulatory System Activity Model » Four raised-relief models provide an overview of blood circulation, the structures of arteries and veins, and an up-close view of the interior of the heart. » Activity binder includes lesson plans, copy masters for student activities, and an overhead transparency. More Sale Products > |
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Semi-Automatic Digital Blood Pressure/Pulse Monitor » The monitor features manual inflation with automatic deflation, as well as automatic shut-off. » Sixty reading memory recall so you can easily recall past systolic/diastolic pressure and pulse rate readings. » Accurate to +/- 3 mm Hg. More Sale Products > |
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February 11, 1809Robert Fulton patented his steamboat for the first time, although he had already made his first successful steamboat trip on the Clermont between New York City and Albany in 1807. Few inventions have been as important as the steamboat, which opened up American rivers to two-way travel.
February 11, 1922
The use of insulin to treat diabetes in a dog was announced in their first paper published on the subject by the Canadian surgeon Frederick Banting and his assistant Charles Best. The previous year, Best had made an extract from pancreatic tissue and injected a solution into a diabetic dog. After an hour, the blood glucose had dropped from 0.2 to 0.1%. They continued their research, and improved the purity of what they named insulin, the hormone responsible for controlling blood sugar levels. The discovery was one of the most revolutionary moments in medicine.
February 11, 1939
The journal Nature published a theoretical paper on nuclear fission. The term was coined by the authors Lise Meitner and Otto Fritsch, her nephew. They knew that when a uranium nucleus was struck by neutrons, barium was produced. Seeking an explanation, they used Bohr's "liquid drop" model of the nucleus to envision the neutron inducing oscillations in a uranium nucleus, which would occasionally stretch out into the shape of a dumbbell. Sometimes, the repulsive forces between the protons in the two bulbous ends would cause the narrow waist joining them to pinch off and leave two nuclei where before there had been one. They calculated the huge amounts of energy released. This was the basis for nuclear chain reaction.
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