http://www.vivo.colostate.edu/hbooks/pathphys/reprod/semeneval/morph.html
What happens if a sperm has two heads? - inviTRA
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How else would a two headed human differ from us?
WebApr 21, 2008 · People who are stricken with a condition called Polycephaly. List View. Player View. Grid View. 26/26. 1 /26. 3. Ratings. … WebDiphallia, penile duplication (PD), diphallic terata, or diphallasparatus, is an extremely rare developmental abnormality in which a mammal is born with two penises. The first … Polycephaly is the condition of having more than one head. The term is derived from the Greek stems poly (Greek: "πολύ") meaning "many" and kephalē (Greek: "κεφαλή") meaning "head". A polycephalic organism may be thought of as one being with a supernumerary body part, or as two or more beings with a shared … See more Two-headed people and animals, though rare, have long been known to exist and documented. Occurrence in humans In humans, as in other animals, partial twinning can result … See more Humans Dicephalic conjoined twins (dicephalus parapagus dipus) • Lycosthenes described a pair of adult female twins who … See more • Double-headed eagle • Triple-headed eagle See more The February 22, 2007, issue of the journal Biology Letters detailed the discovery of a 122 million-year-old fossil of a two-headed Hyphalosaurus lingyuanensis, … See more Mesopotamian mythology • Mušmaḫḫu, a seven headed serpent related to mythology of Ninurta, and Ningishzida. … See more • Amphisbaena • Cephalic disorder • Chimera • Conjoined twins See more the orjula