An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 57
Pagina 17
... contain lime . In fact the exoskeleton is composed of a peculiar animal matter , so much impregnated with carbonate and phosphate of lime that it becomes dense and hard . It will be observed that the body of the crayfish is naturally ...
... contain lime . In fact the exoskeleton is composed of a peculiar animal matter , so much impregnated with carbonate and phosphate of lime that it becomes dense and hard . It will be observed that the body of the crayfish is naturally ...
Pagina 17
... contain lime . In fact the exoskeleton is composed of a peculiar animal matter , so much impregnated with carbonate and phosphate of lime that it becomes dense and hard . It will be observed that the body of the crayfish is naturally ...
... contain lime . In fact the exoskeleton is composed of a peculiar animal matter , so much impregnated with carbonate and phosphate of lime that it becomes dense and hard . It will be observed that the body of the crayfish is naturally ...
Pagina 24
... contain the organs of hear- ing ; while , at the ends of the eyestalks , are the organs of vision . Thus we see that the crayfish has a jointed and segmented body , the rings of which it is composed being very obvious in the abdomen ...
... contain the organs of hear- ing ; while , at the ends of the eyestalks , are the organs of vision . Thus we see that the crayfish has a jointed and segmented body , the rings of which it is composed being very obvious in the abdomen ...
Pagina 31
... contain , and which , like the exoskeleton , turn red when they are boiled . The corresponding part in a cooked lobster goes by the name of the " coral . " Beside these internal structures , the most noticeable are the large masses of ...
... contain , and which , like the exoskeleton , turn red when they are boiled . The corresponding part in a cooked lobster goes by the name of the " coral . " Beside these internal structures , the most noticeable are the large masses of ...
Pagina 34
... contained soft parts being retracted as far as the second joint . The soft membranous part of the exo- skeleton , which connects the hinder end of the carapace with the first ring of the abdomen , gives way , and the body , covered with ...
... contained soft parts being retracted as far as the second joint . The soft membranous part of the exo- skeleton , which connects the hinder end of the carapace with the first ring of the abdomen , gives way , and the body , covered with ...
Termeni și expresii frecvente
abdomen abdominal appendages abdominal somite acid alimentary ambulatory limbs animals antenna antennule aperture appears artery arthrobranchiæ Astacine attached basal joint base become blastomeres blood body branchiæ branchial cavity branchial chamber branchial filaments branchiostegite canal carapace cephalic cephalothorax cervical groove chitinous convex corpuscles coxopodite crayfish Crustacea cuticle cuticular division ecdysis ectoderm ectostracum edge endopodite endosternites epiblast epimeral epipodite exopodite exoskeleton external fact fibres food-yelk forceps front ganglion gastrolith gills gives rise green gland hind-gut hypoblast inner lamina lateral less lobes lobster longitudinal male mandibles maxillipede membrane metameres morphological muscles muscular Nauplius nerve nobilis nucleated cells nuclei organs outer ovum pairs plate pleura podobranchiæ portion posterior present procephalic protopodite region ridge rostrum scaphognathite segments seta setæ side somite species spines stem sternal sternum stomach structure substance surface telson tergal tergum terminal thoracic thoracic limbs thoracic somite tissue transverse wall yelk