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200657 https://hdl.handle.net/2286/R.2.N.200657 http://rightsstatements.org/vocab/InC/1.0/ http://creativecommons.org/licenses/by-nc-sa/4.0 2025-05 40 pages Hartana, Kylie Lozinski-Veach, Natalie Gile, Gillian Barrett, The Honors College School of Biological & Health Systems Engineering What does it mean to be human? Our traditional conceptions of the human have been largely shaped by humanist philosophy, which emphasizes our autonomy from nature, exclusive capacity for language and reason, and a belief in human exceptionalism. Drawing on posthumanist thought, this project examines how developments in tissue engineering, specifically the creation of human-animal chimeras, synthetic embryos, and neural organoids, challenge established ideas of identity, personhood, and ethics. Through these case studies, this thesis argues that such technologies complicate the boundaries of what we consider "human," ultimately challenging whether the category remains meaningful in the 21st century. Posthumanism Humanism Tissue Engineering Human-Animal Chimeras Synthetic Embryos Neural Organoids Fragments of Humanity: Reconsidering Human Identity in the Age of Chimeras, Synthetic Embryos, and Organoids