Chapter 5 Coelenterata 浮游水母类的一般形态、分类、 生物学与经济意义
Chapter 5 Coelenterata 浮游水母类的一般形态、分类、 生物学与经济意义
General features two primary lays: outer ectoderm and inner endoderm radial symmetry Class Hydromedusae Class Scyphomedusae
General features two primary lays: outer ectoderm and inner endoderm radial symmetry Class Hydromedusae Class Scyphomedusae
§5.1 Morphology Hydromedusae
§5.1 Morphology Hydromedusae
External features Form：polypoid and medusoid Morphology – umbrella: exumbrella and subumbrella Velum and pseudovelum Manubrium and mouth lips Tenacle: marginal and oral tentacles Nematocyst： – morphology: operculum, capsule and thread – classification
External features Form：polypoid and medusoid Morphology – umbrella: exumbrella and subumbrella Velum and pseudovelum Manubrium and mouth lips Tenacle: marginal and oral tentacles Nematocyst： – morphology: operculum, capsule and thread – classification
Internal features Gastrovascular System： gastrovascular-cavity Muscular System：radial and circular fibers Nervous and Sensory Cell： – nerve net – ganglion cell – neurosecretory cell
Internal features Gastrovascular System： gastrovascular-cavity Muscular System：radial and circular fibers Nervous and Sensory Cell： – nerve net – ganglion cell – neurosecretory cell