instruction:
In this task, you will be given sentences in which your task is to recognize the name of the organ of the body. An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Although there might be several correct answers, you need to write one of them.
question:
Two siblings presented with typical clinical features of congenital pulmonary alveolar proteinosis ( PAP ) .
answer:
pulmonary

question:
Villous cytotrophoblastic cells were isolated by sequential enzymatic digestion of chorionic villi from the first trimester , second trimester and term placenta and purified on a discontinuous percoll gradient , as described previously . 47 - 49 These cells were positively stained for cytokeratin 7 at 95 % , indicating the cytotrophoblastic origin of the cells .
answer:
placenta

question:
The contribution to radiation risks of different exposure modes ( i . e . inhalation , ingestion and contact with ground surface ) were also analyzed , as well as of specific radionuclides and human body organs .
answer:
body organs