Elements of Comparative ZoologyH. Holt, 1897 - 357 páginas |
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Términos y frases comunes
abdomen adult alimentary canal ambulacral ampullæ animals antennæ aorta appendages arch arteries auricle beetles birds blood blood-vessels body body-cavity bones bony brain branchial butterflies cavity cell cerebellum chambers colony compound eyes connected crayfish Crustacea developed digestive tract dorsal eggs entoderm external eyes feed fins fishes fluid fold forms front ganglia gill-slits gills grasshopper head heart High School horny hydranths insects intestine jellyfishes joints kidneys labium LABORATORY larvæ layers legs limbs live liver lobes lower lungs madreporite mammals mantle maxillæ median membrane mesenterial mesothorax Metazoa molluscs mouth mouth-parts muscles nerves nervous system Notice notochord occur oesophagus opening organs ovipositor pair plates portion posterior Protozoa quadrate bone region reproductive sea-anemone segments sensory septa shell side skeleton Sketch skin skull somites species spiracles sponge starfish stomach structure SUBCLASS surface tail teeth tentacles thorax trace tube usually valve vent ventral ventricle vertebrates wings worms
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