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...the developing embryo, the main role would be of establishing "pattern". SHH name derives from homology to the original fruitfly (drosophila) "hedgehog" ...on is and how SHH is proteolytically cleaved, will determine SHH function. SHH binds to the membrane receptors Patched (ptc) and BOC/CDON.

[[File:Neural - cranial nerves.jpg|thumb|Cranial nerves]] Neural development is one of the earliest systems to begin and the last to be comp

[[File:Limb bud geometry and patterning.jpg|thumb|Limb bud geometry and patterning{{#pmid:20644713|PMID20644713}}]] ...tal muscle, bone, and cartilage and is mainly mesoderm in origin with some neural crest contribution.

In the head, this is a mixture of mesoderm and neural crest differentiation, from mesenchyme and ectomesenchyme respectively. The Note that genes that control skeleton patterning and cell differentiation are different.

Neural development is one of the earliest systems to begin and the last to be comp ...specialized functions and shapes. This section covers the establishment of neural populations, the inductive influences of surrounding tissues and the sequen

[[File:Neural-development.jpg|thumb|300px|alt=Neural Development timeline|Neural Development]] ...ells. Note that PNS {{Schwann cell}}s have a different embryonic origin ({{neural crest}}).

...erm}}), and significantly, a major contribution from the {{neural crest}}. Neural crest contributes jaw skeletal elements, connective tissues and tendons. Th ...s assembled and modified during evolution. For many years, the role of the neural crest in organizing pharyngeal development was emphasized and, as this was

[[File:Limb bud geometry and patterning.jpg|thumb|Limb bud geometry and patterning{{#pmid:20644713|PMID20644713}}]] ...tal muscle, bone, and cartilage and is mainly mesoderm in origin with some neural crest contribution.

...udy reveals specific functions of β-catenin in governing cell identity and patterning mediated through cell adhesion in the developing cochlea. ...ays, we examined miRNA expression in the cochleovestibular ganglion (CVG), neural crest (NC), and otic vesicle (OV) from paraffin embedded (FFPE) human speci

...s of {{bone}} developing from {{mesoderm}}, except within the head where {{neural crest}} also contributes connective tissues. Each tissue ({{cartilage}}, {{ The 2 key developmental processes are the initial "patterning" of bone location and then the overt "differentiation" of bone through the

:(More? [[Neural System Development]] | [http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id= :Clinical term for the surgical removal of the uterine (Fallopian) tube for ectopic pregnancy and other clinical reasons.

[[File:Skin structure cartoon.jpg|thumb|150px|alt=hair follicle cartoon|link=Integumentary_System_-_Hair_Deve ...a that contain blood vessels. General vertebrae anatomy is composed of the neural arch (containing the spinal cord), the haemal arch and the vertebral body (

The "simple tube" of the gastrointestinal tract and its associated organs have many differen ...ion (rare) are a feature of this system. Atresia is an interruption of the tube lumen, the abnormality naming is based upon the anatomical location: common