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.
Rescue breathing is a skill performed for a victim who is not breathing at all, or whose breaths are too slow or irregular to be effective.In rescue breathing, breaths are delivered to the victim by pinching the nose shut and breathing into the victim's mouth.escue breathing is a skill performed for a victim who is not breathing at all, or whose breaths are too slow or irregular to be effective.