A Course of Elementary Instruction in Practical Biology |
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acid adductor muscle alimentary canal animal antheridia aperture appendages arising artery attached auditory axis blastopore blood body body-wall branches Canada balsam capsule cartilage cavity cell-wall cells chamber chitinous chlorophyll chromatophores cilia colour commissures containing corpuscles Crayfish delicate dissect dorsal duct edge elongated epidermis epithelium Examine excretory exoskeleton external fibres filaments fluid Frog front ganglia ganglion genital germinal vesicle gills gland granular high power hypha hyphæ immediately inner integument intestine lateral layer limbs lobes longitudinal low power lying mass maxilla median membrane middle line mouth muscular nematocysts nerve Note nucleus organs orifice outer oval oviduct ovum pair passing pericardium pigmented portion posterior Protococcus protoplasm Remove round Sect seen segment setæ side solution somite specimens spermatozoa spinal Spirogyra sporangium spores stained stem structure surface terminal thickened thin tissue Torula transverse section trunk tube vacuole valves veins ventral ventricle vessels wall