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Gas exchange
Gas exchange or respiration takes place at a respiratory surface; a boundary between the external environment and the interior of the body. For unicellular organisms the respiratory surface is simply ... > more -
Blood sugar
In medicine, blood sugar is a term used to refer to levels of glucose in the blood. Blood sugar concentration, or serum glucose level, is tightly regulated in the human body. Glucose, transported via ... > more -
Cholesterol
Cholesterol is a sterol and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. Cholesterol plays a central role in many biochemical ... > more -
Hysterectomy
A hysterectomy is the surgical removal of the uterus, usually done by a gynecologist. Hysterectomy may be total (removing the body and cervix of the uterus) or partial (also called ... > more -
Pregnancy and Childbirth
Infant's Health
Birth Defects
Sports Medicine
Healthy Aging
Attention Deficit Disorder
Stillbirth
A stillbirth occurs when a fetus, of mid-second trimester to full term gestational age, which has died in the womb or during labour or delivery, exits the maternal ... > more -
Heart valve
In anatomy, the heart valves are valves in the heart that maintain the unidirectional flow of blood by opening and closing depending on the difference in pressure on each ... > more -
White blood cell
White blood cells (also called leukocytes or immune cells) are cells which form a component of the blood. They help to defend the body against infectious disease and foreign materials as part of the ... > more -
Health benefits of tea
The possible beneficial health effects of tea consumption have been suggested and supported by some studies, but others have not found beneficial effects. Studies claim that the polyphenol content of ... > more
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