Outlines of natural history for beginners |
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Página 7
... 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 substance of the ...
... 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 substance of the ...
Página 8
... mouth , but there is no trace of any stomach or other digestive organ , and the particles of food , engulfed by the temporary feet , merely pass into the central , semi - fluid substance of the body . There is an organ ( fig . 1 , B , n ) ...
... mouth , but there is no trace of any stomach or other digestive organ , and the particles of food , engulfed by the temporary feet , merely pass into the central , semi - fluid substance of the body . There is an organ ( fig . 1 , B , n ) ...
Página 10
... mouth , and a short , funnel - shaped gullet , but the mouth does not open into a stomach , or even into a distinct body - cavity . Hence the food simply passes through the mouth into the semi - fluid central substance of the body , and ...
... mouth , and a short , funnel - shaped gullet , but the mouth does not open into a stomach , or even into a distinct body - cavity . Hence the food simply passes through the mouth into the semi - fluid central substance of the body , and ...
Página 11
... mouth is present , but there is no distinct stomach or body - cavity . There are no diges- tive or respiratory organs , and no nervous system , and the only traces of a circulatory system are to be found in one or more little pulsating ...
... mouth is present , but there is no distinct stomach or body - cavity . There are no diges- tive or respiratory organs , and no nervous system , and the only traces of a circulatory system are to be found in one or more little pulsating ...
Página 12
... mouth surrounded by the tentacles , and the disc of attachment ; the dark and light lines indicate the two layers of the integument , and on one side of the body is shown a single large egg . forms a little disc or sucker , by means of ...
... mouth surrounded by the tentacles , and the disc of attachment ; the dark and light lines indicate the two layers of the integument , and on one side of the body is shown a single large egg . forms a little disc or sucker , by means of ...
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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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