Scientific Concepts


breath-holding spells breath alcohol concentration breath alcohol levels breath sounds breath test breath testing breathing breathing conditions breathing difficulties breathing disorders	breathing exercises breathing frequency breathing modes breathing parameters breathing pattern breathing rate breathing system breccia breech delivery breech presentation breed differences	breed dogs breed types breeders breeding breeding adults breeding approach breeding areas breeding attempts breeding behavior breeding behaviour breeding biology	breeding birds breeding colony breeding conditions breeding cycle breeding date breeding density breeding dispersal breeding dispersal distances breeding ecology breeding efforts breeding experience	breeding females breeding grounds breeding groups breeding habitat breeding herds