An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 25
... wall , formed by a delicate , but more or less calcified layer of the exoskeleton , which constitutes the proper outer wall of the thorax . At the upper limit of the branchial cavity , the layer of exoskeleton is very thin , and turning ...
... wall , formed by a delicate , but more or less calcified layer of the exoskeleton , which constitutes the proper outer wall of the thorax . At the upper limit of the branchial cavity , the layer of exoskeleton is very thin , and turning ...
Pagina 50
... wall , that all that is left of it is represented by a system of irregular channels , which are filled with blood , and are termed blood sinuses . The wall of the cylinder is the outer wall of the body itself , to which the general ...
... wall , that all that is left of it is represented by a system of irregular channels , which are filled with blood , and are termed blood sinuses . The wall of the cylinder is the outer wall of the body itself , to which the general ...
Pagina 52
... wall of the whole gastric cavity , as far as the pylorus , where it ends in certain valvular projections . The ... walls of the stomach ; and it confers upon them so great an amount of stiffness that they do not collapse when the organ ...
... wall of the whole gastric cavity , as far as the pylorus , where it ends in certain valvular projections . The ... walls of the stomach ; and it confers upon them so great an amount of stiffness that they do not collapse when the organ ...
Pagina 52
... wall of the whole gastric cavity , as far as the pylorus , where it ends in certain valvular projections . The ... walls of the stomach ; and it confers upon them so great an amount of stiffness that they do not collapse when the organ ...
... wall of the whole gastric cavity , as far as the pylorus , where it ends in certain valvular projections . The ... walls of the stomach ; and it confers upon them so great an amount of stiffness that they do not collapse when the organ ...
Pagina 53
... wall of the stomach in A ; mg , mid - gut ; mt , median tooth , seen through the wall of the stomach in A ; os , esophagus ; p , pyloric ossicle ; pc , pterocardiac ossicle ; pp , prepyloric ossicle ; uc , uro - cardiac process ; t ...
... wall of the stomach in A ; mg , mid - gut ; mt , median tooth , seen through the wall of the stomach in A ; os , esophagus ; p , pyloric ossicle ; pc , pterocardiac ossicle ; pp , prepyloric ossicle ; uc , uro - cardiac process ; t ...
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