Embryology: Difference between revisions
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Embryology literally means the study of embryos, the immature organisms contained within the coverings of an egg or within the body of the mother. | Embryology literally means the study of embryos, the immature organisms contained within the coverings of an egg or within the body of the mother. Embryology is a field of [[biology]] that focuses on the development of new individuals from [[germ cells]]. | ||
=Vertebrate Embryology= | |||
==Fertilization== | |||
Instead of either of the male or female seed components containing a tiny baby, they are each just a cell. When they come together, the new cell, the fertilized egg - swells and changes. | |||
==Gastrulation and The Embryonic Period== | |||
This [[zygote]] divides continually and the cells it becomes dance out a whole extravaganza of movements. The steps of this dance are known to all vertebrates. Whether frog or mouse, human or bird, the dance is nearly the same, right up until the basic form is created. As the cells swirl through their formations, each splits - and they all keep dividing, like the [[Sorcerer’s apprentice]], until there are thousands and then millions and then billions of cells. The dance becomes an extravaganza with whole choruses of cells moving like dancers in a scene from a greatest ballet filmed in an MGM musical with an unlimited budget. Sheets of cells fold and flip to form an intricate tube. Troops of cells disappear to make a crevice, while another multiplying group piles into a bulge. Head to tail, the formations move to bring a shape to the vertebrate embyo. | |||
==The Fetus== | |||
==See also== | ==See also== | ||
Revision as of 08:36, 18 November 2006
Embryology literally means the study of embryos, the immature organisms contained within the coverings of an egg or within the body of the mother. Embryology is a field of biology that focuses on the development of new individuals from germ cells.
Vertebrate Embryology
Fertilization
Instead of either of the male or female seed components containing a tiny baby, they are each just a cell. When they come together, the new cell, the fertilized egg - swells and changes.
Gastrulation and The Embryonic Period
This zygote divides continually and the cells it becomes dance out a whole extravaganza of movements. The steps of this dance are known to all vertebrates. Whether frog or mouse, human or bird, the dance is nearly the same, right up until the basic form is created. As the cells swirl through their formations, each splits - and they all keep dividing, like the Sorcerer’s apprentice, until there are thousands and then millions and then billions of cells. The dance becomes an extravaganza with whole choruses of cells moving like dancers in a scene from a greatest ballet filmed in an MGM musical with an unlimited budget. Sheets of cells fold and flip to form an intricate tube. Troops of cells disappear to make a crevice, while another multiplying group piles into a bulge. Head to tail, the formations move to bring a shape to the vertebrate embyo.
The Fetus
See also
References
- UNSW Embryology Large resource of information and media
Further reading
- Scott F. Gilbert. Developmental Biology. Sinauer, 2003. ISBN 0-87893-258-5.
- Lewis Wolpert. Principles of Development. Oxford University Press, 2006. ISBN 0-19927-536-X.
cs:Embryologie de:Embryologie et:Embrüoloogia es:Embriología eo:Embriologio fr:Embryologie hr:Embriologija it:Embriologia lt:Embriologija nl:Embryologie ja:発生学 pl:Embriologia pt:Embriologia sl:Embriologija tl:Embriyolohiya th:คัพภวิทยา tr:Embriyoloji zh:胚胎学