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Semen Production in the Quran: Difference between revisions
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In embryonic stages, the reproductive organs of the male and female, i.e. the testicles and the ovaries, begin their development near the kidney between the spinal column and the eleventh and twelfth ribs. Later they descend; the female gonads (ovaries) stop in the pelvis while the male gonads (testicles) continue their descent before birth to reach the scrotum through the inguinal canal. Even in the adult after the descent of the reproductive organ, these organs receive their nerve supply and blood supply from the Abdominal Aorta, which is in the area between the backbone (spinal column) and the ribs. Even the lymphatic drainage and the venous return goes to the same area.}}Critics argue that Zakir Naik incorrectly present the biology of the phenomenon he describes above. The original position of the cells, they note, are destined to develop into spermatogonia (sperm producing cells) and is not ventro-medial to the kidneys (where these cells develop) but the wall of the yolk sac:{{Quote|{{cite web|url= http://web.indstate.edu/thcme/duong/EMBRYOL.html|title= Urogenital system embryology|publisher= Indiana University School of Medicine|author= Taihung Duong, Ph.D.|date= accessed February 9, 2014|archiveurl= http://www.webcitation.org/query?url=http%3A%2F%2Fweb.indstate.edu%2Fthcme%2Fduong%2FEMBRYOL.html&date=2014-02-09|deadurl=no}}|Testes and ovaries are derived from the mesodermal epithelium (mesothelium) lining the posterior abdominal wall, the underlying mesenchyme and the primordial germ cells. | In embryonic stages, the reproductive organs of the male and female, i.e. the testicles and the ovaries, begin their development near the kidney between the spinal column and the eleventh and twelfth ribs. Later they descend; the female gonads (ovaries) stop in the pelvis while the male gonads (testicles) continue their descent before birth to reach the scrotum through the inguinal canal. Even in the adult after the descent of the reproductive organ, these organs receive their nerve supply and blood supply from the Abdominal Aorta, which is in the area between the backbone (spinal column) and the ribs. Even the lymphatic drainage and the venous return goes to the same area.}}Critics argue that Zakir Naik incorrectly present the biology of the phenomenon he describes above. The original position of the cells, they note, are destined to develop into spermatogonia (sperm producing cells) and is not ventro-medial to the kidneys (where these cells develop) but the wall of the yolk sac:{{Quote|{{cite web|url= http://web.indstate.edu/thcme/duong/EMBRYOL.html|title= Urogenital system embryology|publisher= Indiana University School of Medicine|author= Taihung Duong, Ph.D.|date= accessed February 9, 2014|archiveurl= http://www.webcitation.org/query?url=http%3A%2F%2Fweb.indstate.edu%2Fthcme%2Fduong%2FEMBRYOL.html&date=2014-02-09|deadurl=no}}|Testes and ovaries are derived from the mesodermal epithelium (mesothelium) lining the posterior abdominal wall, the underlying mesenchyme and the primordial germ cells. | ||
The primordial germ cells form in the wall of the yolk sac during week 4. They later migrate into the developing gonads at week 6 and differentiate into the definitive germ cells (oogonia / spermatogonia).}}If Naik’s assertion that the verse refers to the embryonic testes is accepted, it is not evident whether the gonads are located where he claims, i.e. between the spinal column and the eleventh and twelfth ribs. | The primordial germ cells form in the wall of the yolk sac during week 4. They later migrate into the developing gonads at week 6 and differentiate into the definitive germ cells (oogonia / spermatogonia).}}The full argument of the critics runs as follows. If Naik’s assertion that the verse refers to the embryonic testes is accepted, it is not evident whether the gonads are located where he claims, i.e. between the spinal column and the eleventh and twelfth ribs. A cross-sectional diagram of the human embryo shows the gonads at or around the level of the placenta.<center>[[File:Gondev154.gif|alt=|thumb]]</center>Consequently, it cannot be said that the embryonic testes is located between the spinal column and the eleventh and twelfth ribs as the gonadal or genital ridge (precursor of the gonads) is generally held to lie medial to the lower part of the mesonephros, while the adult kidney actually develops from the metanephros. | ||
It is incorrect to assume the position of the embryonic gonads from the position of the adult kidneys, as the embryonic positions of gonads and kidneys are not the same as their adult positions. Gonads descend, while kidneys enlarge and ascend. It should also be noted that the developing gonads are ventro-medial to the mesonephros (i.e. the embryonic kidney) and not the metanephros (which would develop into the adult kidney). Zakir Naik's explanation does not differentiate between the mesonephros and the metanephros. | It is likewise incorrect to assume the position of the embryonic gonads from the position of the adult kidneys, as the embryonic positions of gonads and kidneys are not the same as their adult positions. Gonads descend, while kidneys enlarge and ascend. It should also be noted that the developing gonads are ventro-medial to the mesonephros (i.e. the embryonic kidney) and not the metanephros (which would develop into the adult kidney). Zakir Naik's explanation does not differentiate between the mesonephros and the metanephros. | ||
If Naik’s implied association between embryonic and adult anatomical positions were nonetheless accepted, the explanation is inaccurate because in the condition of cryptorchidism where the testes is undescended, the highest position of the undescended testes is ''below'' the kidney.<ref>[http://www.nakshatras.net/genetics_basics.htm genetics basics]</ref> | If Naik’s implied association between embryonic and adult anatomical positions were nonetheless accepted, the explanation is inaccurate because in the condition of cryptorchidism where the testes is undescended, the highest position of the undescended testes is ''below'' the kidney.<ref>[http://www.nakshatras.net/genetics_basics.htm genetics basics]</ref> | ||