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Xenopus Anatomy Ontology
Last uploaded:
September 3, 2024
| Id | http://purl.obolibrary.org/obo/XAO_1000037
http://purl.obolibrary.org/obo/XAO_1000037
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|---|---|
| Preferred Name | NF stage 21 |
| Definitions |
Nieuwkoop and Faber stage 21, corresponding to an embryo of age 22 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Suture of neural tube completely closed. Delimitation of frontal field by pigment lines. Primary eye vesicles showing through in the form of two separate, obliquely placed oval spots; beginning of protrusion of eyes. Lateral outline of embryo just becoming concave, ventral outline flat. Length: 1.9 - 2.0 mm.
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| Type | http://www.w3.org/2002/07/owl#Class |
All Properties
| definition | Nieuwkoop and Faber stage 21, corresponding to an embryo of age 22 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Suture of neural tube completely closed. Delimitation of frontal field by pigment lines. Primary eye vesicles showing through in the form of two separate, obliquely placed oval spots; beginning of protrusion of eyes. Lateral outline of embryo just becoming concave, ventral outline flat. Length: 1.9 - 2.0 mm. |
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| prefLabel | NF stage 21
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| label | NF stage 21
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| has_obo_namespace | xenopus_developmental_stage
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| type | |
| id | XAO:1000037
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| part_of | |
| notation | XAO:1000037
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| preceded by | |
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