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| Term | somatic muscle primordium | ID (Ontology) | FBbt:00005518 (Fly Anatomy) | ||||||||||||||
| Definition | Primordium of the larval segmentally-repeated body wall musculature. It arises from the outer layer of the trunk mesoderm. During germ band shortening (stage 13), it segregates into loose segmental clusters. Within these clusters, muscle formation proceeds by fusion of fusion competent myoblasts to muscle founder cells. Formation of the embryonic/larval somatic musculature is complete by stage 17.[ FlyBase:FBrf0064793 FlyBase:FBrf0064803 FlyBase:FBrf0089570 ] | ||||||||||||||||
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embryo |__developing embryonic structure______________ developing material anatomical entity | |__developing embryonic structure______________| |__primordium__________________________________| presumptive embryonic/larval system | |__presumptive embryonic/larval muscle system__| trunk mesoderm derivative | |__somatic trunk mesoderm derivative___________| somatic muscle primordium 653 rec. |__embryonic somatic muscle 225 rec. |__embryonic hypodermal muscle(+) 9 rec. |__embryonic somatic muscle cell(+) 216 rec. |
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| Is a |
developing embryonic structure primordium somatic trunk mesoderm derivative |
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| Part of | presumptive embryonic/larval muscle system | ||
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