a small perch of India whose gills are modified to allow it to breathe air; has spiny pectoral fins that enable it to travel on land

a small perch of India whose gills are modified to allow it to breathe air; has spiny pectoral fins that enable it to travel on land

a method that prepares a mother for natural childbirth by providing education and exercises and nutrition and techniques of breathing and relaxation (with the assistance of the father)

breathing in which most of the respiratory effort is done by the abdominal muscles