Unit2O steoporosis课件1.pptVIP

About This Term Requirements: 1. Full class attendance and active involvement 2. Continued attention on word-formation 3. More careful study of texts 4. Persistence in after-class reading and writing 5. A notebook for medical English learning Unit 2 Osteoporosis Word Formation oste/o (bone) e.g. osteoporosis -osis (diseased condition) -orexia (appetite) e.g. anorexia -ia (diseased condition) e.g. bulimia neur/o (nerve) e.g. neuromuscular meno- (menses;menstruation;period) 月经 e.g. menopause hyster/o (uterus ) e.g. hysterectomy andr/o (male) e.g. androgen estr/o (female) e.g. estrogen hypo- (deficiency) e.g. hypogonadism gonad/o (gonad) e.g. gonadotropin dys- (with difficulty) e.g. dysfunction -ectomy ( excision) -tomy (incision) gastr/o ( stomach) Questions to consider： 1. What is osteoporosis ? 2. What are the possible causes and general symptoms ? 3. How to prevent osteoporosis ? Osteoporosis Overview The word osteoporosis literally means porous bones. It occurs when bones lose an excessive amount of their protein and mineral content, particularly calcium. Over time, bone mass, and therefore bone strength, is decreased. As a result, the bones become fragile and break easily. Even a sneeze or a sudden movement may be enough to break a bone in someone with severe osteoporosis. Osteoporosis is a condition characterized by progressive loss of bone density, thinning of bone tissue and increased vulnerability to fractures. Osteoporosis may result from disease, dietary or hormonal deficiency or advanced age. Regular exercise and vitamin and mineral supplements can reduce and even reverse loss of bone density. Osteoporosis is caused by decreased bone mass resulting in fragile bones. Progressive osteoporosis may cause loss of height, stooped posture, a humpback, and severe pain.