Outlines of natural history for beginners |
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Página 7
... single permanent mouth , the Amoeba can make a mouth for itself at any point of the surface of the body , and its process of feeding has been appropriately compared to thrusting a stone into a lump of dough . As before remarked , the ...
... single permanent mouth , the Amoeba can make a mouth for itself at any point of the surface of the body , and its process of feeding has been appropriately compared to thrusting a stone into a lump of dough . As before remarked , the ...
Página 12
... single large egg . forms a little disc or sucker , by means of which the animal can attach itself to stones , floating pieces of wood , or the stems of water - plants . It can also , by means of this disc , glide slowly , like a snail ...
... single large egg . forms a little disc or sucker , by means of which the animal can attach itself to stones , floating pieces of wood , or the stems of water - plants . It can also , by means of this disc , glide slowly , like a snail ...
Página 26
... single point , in a triradiate manner , and they are the organs by which the Leech cuts through the skin , in order to get at the blood - vessels beneath . Hence the bite of a leech consists of three little cuts radiating from a point ...
... single point , in a triradiate manner , and they are the organs by which the Leech cuts through the skin , in order to get at the blood - vessels beneath . Hence the bite of a leech consists of three little cuts radiating from a point ...
Página 29
... single pair of appendages of some kind or other . If we look at the Lobster from above ( fig . 13 , 1 ) , we see at once that the body is very plainly divided into two parts , which would familiarly be called the " head " and " tail ...
... single pair of appendages of some kind or other . If we look at the Lobster from above ( fig . 13 , 1 ) , we see at once that the body is very plainly divided into two parts , which would familiarly be called the " head " and " tail ...
Página 31
... single branch . The fourth , fifth , sixth , and seventh segments carry each a pair of jaws , differing somewhat in each segment , and the last pair so closely approaching the true legs or " feet " in structure as to receive the name of ...
... single branch . The fourth , fifth , sixth , and seventh segments carry each a pair of jaws , differing somewhat in each segment , and the last pair so closely approaching the true legs or " feet " in structure as to receive the name of ...
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Palavras e frases frequentes
abdomen adductor muscle Advanced Text-Books animal antennæ appendages arms attached backbone beak bivalve blood body body-cavity bone breathing-organs breathing-tubes carries cavity chambers characters distinguish colour common common Frog common House Spider composed consists contained Crown 8vo Diagram Dictionary digestive distinct heart distinct vent distinguish the class domestic Goose dorsal fin Edition Engravings eyes Fcap feelers fins fluid Flustra foot-jaws Frog front Geology gills Goose Greek Grey Lag gullet head horny Hydra insect internal anatomy intestine jointed known Latin Leech limbs Lithobius Lithobius forficatus little nervous masses Lobster lower surface lungs mantle MANUAL means membranous mouth muscular Mya arenaria nervous system opens outer pairs of legs peculiar Perch PHYSICAL GEOGRAPHY plate portion processes quadrate bone RECAPITULATION OF ESSENTIAL rings or segments rudimentary Scolecida shell side skin skull soft spines Star-fish stomach sub-kingdom sucker tail teeth tentacles thorax tion tube valve Whelk Zoology
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