K12 Comparative Embryology: Difference between revisions
m (→Limbs) |
m (→Limbs) |
||
Line 125: | Line 125: | ||
{| | {| | ||
| Many different animals form limbs (arms and legs). During embryo development there are common signalling molecules and regions that form the initial limb structure. A similar process occurs for both the upper (arm) and low (leg) limb development. | | Many different animals form limbs (arms and legs). During embryo development there are common signalling molecules and regions that form the initial limb structure. A similar process occurs for both the upper (arm) and low (leg) limb development. | ||
The final limb structures formed can appear different, but the bones shows that they share a pattern of development. | The final limb structures formed can appear different, but the bones shows that they share a pattern of development. | ||
Line 131: | Line 132: | ||
Early human embryo upper and lower limbs. | Early human embryo upper and lower limbs. | ||
|- | |- | ||
| [[File:Limb comparison cartoon 02.jpg|600px]] | | colspan=2|[[File:Limb comparison cartoon 02.jpg|600px]] | ||
Upper limb bones of 4 different species. Each limb is significantly different in size and function, but all contain the same basic skeletal structures. | Upper limb bones of 4 different species. Each limb is significantly different in size and function, but all contain the same basic skeletal structures. |
Revision as of 14:35, 5 September 2016
Embryology - 23 Apr 2024 Expand to Translate |
---|
Google Translate - select your language from the list shown below (this will open a new external page) |
العربية | català | 中文 | 中國傳統的 | français | Deutsche | עִברִית | हिंदी | bahasa Indonesia | italiano | 日本語 | 한국어 | မြန်မာ | Pilipino | Polskie | português | ਪੰਜਾਬੀ ਦੇ | Română | русский | Español | Swahili | Svensk | ไทย | Türkçe | اردو | ייִדיש | Tiếng Việt These external translations are automated and may not be accurate. (More? About Translations) |
Introduction
All human and animal embryos go through very similar stages of early development. See also Humans and Animal Embryology.
This page introduces a few of the concepts of comparative development shared with all animals.
Meiosis
Mitosis
GastrulationBody PlanBelow is an example of what happens in a fly if these patterning signals get disrupted, putting legs from the body on the head where antenna should be located.
This fly mutation identified a common patterning gene family called Hox that establishes the head to tail axes in the embryo. This complicated picture shows how different Hox genes are expressed at different embryo levels in different species (worms, flies, mouse and human).
LimbsCite this page: Hill, M.A. (2024, April 23) Embryology K12 Comparative Embryology. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/K12_Comparative_Embryology
|