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Prokaryotic cells are smaller and less complex than Eukaryotic cells. Bacterial cells are prokaryotic, whereas plant and animal cells are eukaryotic. In terms of structure, there are three key differences...
Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration,whereas osmosis is the passive movement of solut...
The heart is a muscular organ composed of 4 chambers; the left atrium and right atrium (pl. atria) and the left ventricle and right...
Artery walls are made up of smooth muscle tissue and a thick elastic layer which allows them to expand and contract easily, coping with the changes in blood volume that occur with each heartbeat. The musc...
Carbon monoxide is a poisonous gas. It binds to haemoglobin in red blood cells irreversibly. This means that less oxygen can be carried by red blood cells. As oxygen delivery decreases to muscles and so l...
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