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5.1.2 Early allocation and ... Limb development in vertebrates is an area of active ... Comparisons of the core ZRS in several snake species to the mouse and lizard ...
Toggle Upper limb subsection. 1.1 Arm and shoulder. 1.2 Hand and wrist. 2 Lower limb. 3 Other. 4 References. 5 See also. Toggle the table of contents. List of ...
The core or trunk is the axial (central) part of an organism's body. In common parlance, the term is broadly considered to be synonymous with the torso, but academically it also includes the head and neck. Functional movements are highly dependent on this part of the body, and lack of core muscular development can result in a predisposition to ...
Pentadactyly (from Greek πέντε pénte "five") is the condition of having five digits on each limb. It is traditionally believed that all living tetrapods are descended from an ancestor with a pentadactyl limb, although many species have now lost or transformed some or all of their digits by the process of evolution.
Limb development is controlled by Hox genes. All jawed vertebrates surveyed so far organize their developing limb buds in a similar way. Growth occurs from proximal to distal part of the limb. On the distal end, the differentiation of skeletal elements occurs in an apical ectodermal ridge (AER) which expands in rays.
2.5 Upper limb (arm and forearm) and hand. 2.6 Lower limb (thigh and leg) and foot. 3 See also. 4 References. Toggle the table of contents. List of bones of the human ...
The converse – transplantation of an early limb bud to a late limb bud – also results in normal limb development. However, the underlying mesoderm in the progress zone is fate specified. If progress zone mesoderm is transplanted along with the AER, then additional finger/toes are formed (for an early → late transplantation) or the finger ...
A kosha (also kosa; Sanskrit कोश, IAST: kośa), usually rendered "sheath", is a covering of the Atman, or Self according to Vedantic philosophy. The five sheaths, summarised with the term Panchakosha, are described in the Taittiriya Upanishad (2.1-5), [1] [2] and they are often visualised as the layers of an onion. [3]