# text.div
This code system http://hl7.org/fhir/product-category defines the following codes:

Code | Display | Definition
organ | Organ | A collection of tissues joined in a structural unit to serve a common function.
tissue | Tissue | An ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function.
fluid | Fluid | Body fluid.
cells | Cells | Collection of cells.
biologicalAgent | BiologicalAgent | Biological agent of unspecified type.

# concept[].definition
A collection of tissues joined in a structural unit to serve a common function.

# concept[].definition
An ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function.