amnion. the innermost fetal membrane, which forms a sac filled with amniotic fluid that surrounds the embryo and later the fetus; as it enlarges it gradually obliterates the chorionic cavity and enfolds the umbilical cord. Called also bag of waters.
cluster breathing. cluster breathing. a breathing pattern in which a closely grouped series of respirations is followed by apnea. The activity is associated with a lesion in the lower pontine region of the brainstem. See also Biot's respiration, Cheyne-Stokes respiration.
(October 2014) Fire breathing is the act of creating a plume or stream of fire by creating a precise mist of fuel from the mouth over an open flame. Regardless of the precautions taken, it is always a dangerous activity, but the proper technique and the correct fuel reduces the risk of injury or death.