“Then, as if in tribute to the adventitious nature of idea generation, the solution came to him in his sleep.”

“These, although not products, but introduced from without, are nevertheless adventitious to the mechanism in which they are found.”

“Programmed cell death also takes place in the cortex of adventitious roots to form aerenchyma.”

“The inclusions may also be found in the adventitial cells of blood vessels.”

“Aneurysmal development is caused by weakness in the muscular tunica media and stretching of the tunica intima and adventitial layers.”

“Intimai proliferation and adventitial thickening may further reduce the cross-sectional area of the pulmonary vascular bed.”