n. organ that exchanges gases between the blood and the air (*) lung (*) esophagus (*) factor (*) diarrhea

n. space between two pleuro or membranes in the lung (*) intrapleural space (*) acetone (propanone) (*) sebum (*) conjugate acid

n. the back of the body (*) dorsum (*) cytoplasm (*) halogen (*) adaptation

n. process of production of sperm (*) blindness (*) conjugation (*) spermatogenesis (*) knee

n. the time a baby leaves its mothers body (*) birth (*) protease (*) assortative mating (*) unsaturated fat

n. the ball of stem cells that develop after a fertilized embryo divides is called a blastocyst (*) brainstem (*) lanthanide series (*) post-traumatic stress disorder (PTSD) (*) blastocyst

n. tiredness that occurs with exercise (*) fatigue (*) class (*) ozone (*) enantiomer

n. compounds where a hydroxyl group is replaced by an amino group (*) cilium (*) labor (*) fertilization (*) amino sugar

n. carbohydrate which can be found in potatoes, rice, bread and other foods (*) fever (*) starch (*) neutral solution (*) hypotonic solution

n. speed (*) velocity (*) birth control (*) atrioventricular node (*) conjunctiva