In Egyptian mythology, Imsety is the human-headed son of Horus who protects the liver.
Imsety belongs to the four sons of Horus, funerary deities who guarded the internal organs removed during mummification. The standard association assigns the liver to Imsety, the lungs to Hapy, the stomach to Duamutef, and the intestines to Qebehsenuef.
Canopic jars eventually received lids representing these four deities. Imsety’s human head distinguishes him from Hapy’s baboon, Duamutef’s jackal, and Qebehsenuef’s falcon. The goddess Isis was traditionally regarded as Imsety’s protective counterpart, and Imsety was associated with the south.
The organ assignments were not perfectly uniform in every burial, especially for Hapy and Duamutef, but Imsety’s connection with the liver is the standard and quiz-canonical pairing. “Human” refers to his head or iconographic form, not to his being a mortal human.