nevertheless , three organs may still be studied in macerated fetuses : the lungs ( where different glandular , canalar , and alveolar stages of development are evident ) , the kidneys ( where the respective numbers of rows of primitive glomeruli and of generations of mature glomeruli vary after week 22 ) , and the adrenal glands ( where neuroblastic nests are normally found between weeks 7 and 26 of gestation ) .
C0022646
kidneys
C0001625
adrenal glands