An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina xi
... 12 . " " 13 . 93 99 15 . 99 23+ 99 99 99 99 14 . 9 : 99 : : 99 16 . 99 99 THE HEART 29 17 . 99 99 99 18 . 19 THE GREEN GLAND 99 وو • • STRUCTURE OF THE GILLS PAGE FIG . 19. Astacus fluviatilis . MUSCULAR TISSUE 91 2 LIST OF WOODCUTS.
... 12 . " " 13 . 93 99 15 . 99 23+ 99 99 99 99 14 . 9 : 99 : : 99 16 . 99 99 THE HEART 29 17 . 99 99 99 18 . 19 THE GREEN GLAND 99 وو • • STRUCTURE OF THE GILLS PAGE FIG . 19. Astacus fluviatilis . MUSCULAR TISSUE 91 2 LIST OF WOODCUTS.
Pagina 27
... in a crayfish which has been just killed , the heart is seen still pulsating . It is an organ of considerable relative size ( fig . 5 , h ) , which is situated immediately beneath the 99- amm Ir ag aa Cs -oa pg -t aa.
... in a crayfish which has been just killed , the heart is seen still pulsating . It is an organ of considerable relative size ( fig . 5 , h ) , which is situated immediately beneath the 99- amm Ir ag aa Cs -oa pg -t aa.
Pagina 28
... heart ; hg , hind gut , or large intestine ; Ir , liver ; oa , ophthalmic artery ; pg posterior gastric muscles ; saa , superior abdominal artery ; t , testis ; vd , vas deferens . 66 THE CRABS -EYES . " 29 middle region of.
... heart ; hg , hind gut , or large intestine ; Ir , liver ; oa , ophthalmic artery ; pg posterior gastric muscles ; saa , superior abdominal artery ; t , testis ; vd , vas deferens . 66 THE CRABS -EYES . " 29 middle region of.
Pagina 55
... heart , not that which is nearest to it , as in man . The gullet is lined by a firm coat which resembles thin parchment . At the margins of the mouth , this strong lining is easily seen to be continuous with the cuticular exoskeleton ...
... heart , not that which is nearest to it , as in man . The gullet is lined by a firm coat which resembles thin parchment . At the margins of the mouth , this strong lining is easily seen to be continuous with the cuticular exoskeleton ...
Pagina 62
... heart ; ha , hepatic artery ; hg , hind - gut ; iaa , inferior abdominal artery ; la , right lateral aperture of heart ; lr , left liver ; mg , mid - gut ; oa , ophthalmic artery ; a , œsophagus ; pg , posterior gastric muscles , the ...
... heart ; ha , hepatic artery ; hg , hind - gut ; iaa , inferior abdominal artery ; la , right lateral aperture of heart ; lr , left liver ; mg , mid - gut ; oa , ophthalmic artery ; a , œsophagus ; pg , posterior gastric muscles , the ...
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