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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 pum...

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 ca...

Mitosis is the replication and division of a cell to produce 2 Identical daughter cells. It happens in all somatic cells all over the body. Meiosis is specific to germ cells (ovaries and ...

Cellulose is a linear polysaccharide polymer with many glucose monosaccharide units. The linkage is beta, which makes it different from starch. This difference results in a major different in digestibilit...

Each kidney contains 1000s of nephrons and this is where a process called ultrafiltration occurs. Blood from the renal artery flows through the glomerulus at high pressure. The glomerulus is a bundle of c...