1.Definition Haemorrhoids develop when vein-filled spongy areas of tissue in the lining of the rectum and anus become swollen. Haemorrhoids are sometimes called ‘piles’. They can be internal (inside the anal canal) or external (outside the anal canal). They are common, particularly after the age of 40 and during pregnancy. External haemorrhoids are small, painful …

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Bone Development

1. Bone development is presented as the cumulative effect of a large number of interacting factors (genetic, hormonal, nutritional, environmental, behavioral) that activate bone cells first to build (the bone “modeling” of growth) and then to maintain (the bone “remodeling” of maturity) bone tissue. As a bone develops it must not only increase in length …

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