Sexually transmitted diseases (STDs) are infections that are passed from one person to another through sexual contact. The causes of STDs are bacteria, parasites, yeast, and viruses. There are more than 20 types of STDs, including. Chlamydia. Genital herpes. Gonorrhea.
Society for Endocrinology. Hormones. Oxytocin is a hormone that acts on organs in the body (including the breast and uterus) and as a chemical messenger in the brain controlling key aspects of the reproductive system including childbirth and lactation, and aspects of human behaviour.
Each tissue is with metabolic enzymes to release energy. Red blood cells do not have mitochondria . They get energy through glycolysis. Tissues like muscles have mitochondria . When muscles need energy mitochondria through mitochondria release more energy. Liver is the primary organ of metabolism. In liver carbohydrates, lipids and amino acids are metabolized. All tissues other than liver can metabolism carbohydrates fat and amino acids.