regurgitation (Science: cardiology, gastroenterology) A backward flowing, as the casting up of undigested food or the backward flowing of blood into the heart or between the chambers of the heart when a valve is incompetent. Origin: L. Gurgitare = to flood..
This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..
Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..
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A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
