Meaning & use

ground substance

noun·Advancedbiologytechnical

Last updated

UK/ˈɡraʊnd ˌsʌbstəns/
US/ˈɡraʊnd ˌsʌbstəns/

Meanings

  1. noununcountablespecialist

    The gel-like material between the cells and fibers of connective tissue, giving the tissue cushioning and a way to move nutrients.

    Grammar: Uncountable: the ground substance is a gel.

    Patterns

    • the ground substance of something

    Water-holding molecules make up much of the ground substance of cartilage.

    Nutrients move through the ground substance to reach the cells.

    Bacteria can break down the ground substance and spread through tissue.

  2. noununcountablespecialist

    In a cell or tissue, the background material that fills space around larger structures.

    Grammar: Often used in histology texts.

    Patterns

    • embedded in the ground substance

    Under the microscope, the cells sit embedded in the ground substance.

    Stains show the ground substance as pale pink.

    The ground substance gives the tissue a smooth, jelly-like feel.

Common combinations

extracellular ground substance
The extracellular ground substance holds the fibers in place.
ground substance and fibers
Connective tissue is made of cells, ground substance and fibers.
gel-like ground substance
The gel-like ground substance cushions joints.
ground substance of cartilage
The ground substance of cartilage holds water.

Synonyms and how they differ

matrix
Matrix is the whole material around cells including fibers, while ground substance is only the gel part.
extracellular fluid
Extracellular fluid is any fluid outside cells, not necessarily the gel of a tissue.
gel
Gel describes the texture, but ground substance names the biological material.

Word family

ground adjective
here meaning background or basic
matrix noun
the surrounding material of tissue
substance noun
material of a particular kind
connective tissue noun
tissue that supports and links other tissues

Commonly confused: ground substance or ground state?

ground substance vs ground state

Ground state is the lowest energy level of an atom, a physics term and not a tissue.

Practice

In connective tissue, the gel that fills the gaps between fibers and cells is called the ___.

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