A Course of Practical Instruction in Elementary Biology

abdominal acid adductor animal antheridia antherozooids aortic arch aperture appendages archegonia artery attached axis become blood body bone branches canal carbonic anhydride cartilage cavity cells chamber chlorophyll chromic acid cilia colour colourless containing cord dissect divided division dorsal edge elongated epidermis examine exoskeleton external fibres filaments fluid free end Frog front ganglia ganglion gills give rise granular granules heart high power Hydra hypha hyphæ inch obj inner integument internodes intestine layer limbs lobes Lobster mass maxillæ median membrane middle line mouth muscles nerve Note nucleus organs outer oval pair papillæ passes pericardium peristome plant posterior end prothallus Protococcus protoplasm rectus internus rounded running seen side skull solution somites specimens spinal sporangia sporangium spores stem stomach structure surface terminal thick thin tissue Torula transparent transverse section trunk tube urostyle valves vein ventral ventricle vertebral vertebral column vessels Vorticella walls yeast