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'Parenchyma' is a term used to describe a bulk of a substance. It is used in different ways in animals and in plants.
The term is New Latin, from Greek ''parenkhuma'', visceral flesh, from ''parenkhein'', to pour in beside : para-, beside + en-, in + khein, to pour.^[1]

Contents

In animals

In plants

References

In animals

The '''parenchyma''' are the functional parts of an organ in the body.^[2] This is in contrast to the stroma, which refers to the supporting tissue of organs.
Examples include:

'Organ'	'Parenchyma'
kidney	nephrons
lungs	alveoli
spleen	white pulp and red pulp
brain	neurons

In plants

:''Main article: Ground Tissue: Parenchyma''
'''Parenchyma cells''' are thin-walled cells of the ground tissue that make up the bulk of most nonwoody structures, although sometimes their cell walls can be lignified. Parenchyma cells in between the epidermis and pericycle in a root or shoot constitute the cortex, and are used for storage of food. Parenchyma cells within the center of the root or shoot constitute the pith. Parenchyma cells in the ovary constitutes the 'nucellus' and are brick-like in formation.

References

1.
2. http://www.siumed.edu/~dking2/intro/glands.htm#7