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.

Q:  This process was followed by expression of bone markers ( Type I Collagen and Osteocalcin ) , suggesting endochondral ossification .

A: bone
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Q:  Effects of hypertension and sympathetic denervation on cerebral blood flow in newborn pigs .

A: cerebral
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Q:  Cerebral blood flow ( CBF ) was measured with continuous arterial spin - labeling perfusion magnetic resonance ( MR ) imaging in 14 children with sickle cell disease and seven control subjects .

A:
Cerebral
****