Tag: chromatophores
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Vaucheria
According to Fritsch system of classification, Vaucheria is placed in Chlorophyceae. Fritsch system of classification: Class – Chlorophyceae Order – Siphonales Family – Vaucheriaceae Genus – Vaucheria According to Smith, Vaucheria is placed under Xanthophyceae. Smith system of classification: Class – Xanthophyceae Order – Heterosiphonales Family – Vaucheriaceae Genus –Vaucheria which…
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Xanthophyceae (Yellow Green Algae)
General characteristics of Xanthophyceae Members of Xanthophyceae are commonly fresh water (Tribonema) and most of them are free floating. Plant body is unicellular (Heterochloris) or multicellular. The multicellular bodies also exhibit various forms like: Palmelloid (Chlorogloea), dendroid (Mischococcus), coccoid (Chlorobotrys), rhizopodial (Stipitococcus). Cells are eukaryotic with silica and pectin in cell wall. Chief pigment are…
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Integumentary System (Skin and its derivatives)
Introduction The common structural pattern of both aquatic & terrestrial vertebrates of integument is… Epidermis Derived from Ectoderm Stratified i.e. consists of multi-layers of cells Dermis Derived mainly from mesoderm Formed of connective tissue Contain blood & lymph vessels, nerve & smooth muscle fibres, receptors and also special irregular pigment cells (chromatophores) Below dermis, subcutaneous…