Which donor cell type is harvested from a donor of the same species as the recipient?

The answer is based on the definition of donor cell types and their relation to the recipient's genetic makeup. Allogenic cells are those harvested from a donor of the same species as the recipient. This characteristic is crucial in tissue engineering and transplantation because it implies that while the cells come from a different individual, they still share the same species' genetic background, which can help reduce the risk of immune rejection compared to cells from a different species.

In contrast, autologous cells are derived from the same individual who will receive the tissue, ensuring compatibility but not involving a donor. Xenogenic cells, on the other hand, come from a different species entirely, while stem cells refer to a specific type of undifferentiated cell that can give rise to various cell types but does not inherently define its relationship to the recipient. Understanding the distinctions among these cell types and their implications for compatibility and rejection in tissue engineering is vital for successful applications.