They find it difficult to do so and form "regenerative nodules" that only partially carry out normal liver function.

Far from fighting the microbes, the plant forms nodules that give them protective shelter.

Their ability to form nitrogen-fixing nodules confers a selective advantage in poor soils.

The junction of the ridges and the ribs form strong nodules.

These do not form nodules (indeed most of the plants do not have roots).

In some eyes, retinal vessels form small nodules on the surface of the retina, known as angiomas.

Instead, these cells form blobs or nodules of neurons that line ventricles.

As this was left behind it formed nodules of hard flint.

The junction of the ribs and the cords form weak nodules.

All rhizobia that could form nodules on roots of certain legume types have been collectively taken as a species.