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Download guyton physiology pdf free OR buy its hard copy at discount price. Biology: Biology, study of living things and their vital processes that deals with all the physicochemical aspects of life. Modern principles of other fields, such as chemistry, medicine, and physics, for example, are integrated with those of biology in areas such as biochemistry, biomedicine, and biophysics.Hemoglobin ( American) or haemoglobin ( British) ( / ˈ h iː m ə ˌ ɡ l oʊ b ɪ n, ˈ h ɛ-, - m oʊ- / ), abbreviated Hb or Hgb, is the iron- containing oxygen- transport metalloprotein in the red blood cells ( erythrocytes) of almost all vertebrates ( the exception being the fish family Channichthyidae) as well as the tissues of some invertebrates. Haemoglobin in the blood carries oxygen from the.
Childbirth, also known as labour and delivery, is the ending of a pregnancy by one or more babies leaving a woman' s uterus by vaginal passage or Caesarean section. In, there were about 135 million births globally.
About 15 million were born before 37 weeks of gestation, while between % were born after 42 weeks.