Human sperm and egg cell: OpenAI-generated biomedical illustrations, 26 October 2026. Representative cell dimensions, not measured microscopy. Sperm 60 μm total length, https://arxiv.org/abs/1501.01508 . Oocyte cell-body diameter120 μm, https://pmc.ncbi.nlm.nih.gov/articles/PMC10335168/ . Zona pellucida outside measured body.
Cheetah:1.3m head–body length excludes tail, https://animals.sandiegozoo.org/animals/cheetah . Other life comparisons retain stated dimensions (tuna length, elephant shoulder height, manta wingspan, Tesla length).