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what are the risk factors for coronary heart disease and what is it?

Coronary heart disease involves the arteries supplying the heart, known as the coronary arteries. There are two arteries namely the left and right coronary arteries. Healthy coronary arteries are nice and wi...
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Describe how the structure of the renal corpuscle facilitates ultrafiltration.

In the human body, ultrafiltration is the non-specific filtration of blood at a molecular level under high pressure. Renal corpuscles are the starting point of nephrons (the functional units of the kidney), ...
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Answered by David N. • Biology tutor
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What is the difference between animal and plant cells?

Most animal cells have:A nucleus (DNA is stored)Ribosomes (proteins are made)Mitochondria (ATP is produced for energy)Cytoplasm (most chemical reactions take place here)Cell membrane (lets certain things in ...
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Answered by Aiman K. • Biology tutor
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What is a heart attack?

A heart attack occurs when the flow of blood through a coronary artery is blocked, preventing an area of heart muscle from being supplied with oxygen and nutrients. As a result, the heart's ability to pump b...
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Answered by Maya L. • Biology tutor
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Describe the structure of DNA

DNA is a nucleic acid. Nucleic acids are made up of 3 base units: a 5 carbon sugar (for DNA this is deoxyribose), a phosphate and a nitrogenous base. The phosphate group is covalently bonded to the 5th carbo...
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Answered by Bethanie M. • Biology tutor
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