Summary Voice of the genome

The organisation of cells into tissue
Specialised cells that make the same proteins, have the same chemical
markers to prevent certain genes from being expressed, group themselves Cells:
into clusters.
Mass of cytoplasm that is microscopic,
Cell membranes have specific recognition proteins. Known as adhesion which contains the nuclei and other
molecules.
function in organelles.
Adhesion molecules help cells recognise other cells like themselves and stick
Tissue:
to them.

A small part of each recognition protein is embedded into the cell Tissues are groups of cells that have a
membrane, a larger part then extends out of the cell surface membrane. similar structure and act together to
perform a specific function
The exposed section binds to any complementary proteins on the
adjacent cell.

Particular recognition proteins synthesised by a cell determines which
cells it can and cannot attach to.

If cells from different tissues are separated and then mix together, they
reform int other tissues as the recognition protein binds.




In tissues, cells also interact with the extracellular matrix, a network of molecules secreted by cells. In some tissues, the
extracellular matrix is a major component of the tissue – cartilage.