Animal Life: A First Book of ZoölogyD. Appleton, 1900 - Всего страниц: 329 |
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Стр. 1
... mass of a viscid , nearly colorless , substance called protoplasm . This protoplasm is differentiated to form two parts or regions of the cell , an inner denser mass called the nucleus , and an outer , clearer , inclosing mass called ...
... mass of a viscid , nearly colorless , substance called protoplasm . This protoplasm is differentiated to form two parts or regions of the cell , an inner denser mass called the nucleus , and an outer , clearer , inclosing mass called ...
Стр. 3
... mass of a viscid , nearly colorless , substance called protoplasm . This protoplasm is differentiated to form two parts or regions of the cell , an inner denser mass called the nucleus , and an outer , clearer , inclosing mass called ...
... mass of a viscid , nearly colorless , substance called protoplasm . This protoplasm is differentiated to form two parts or regions of the cell , an inner denser mass called the nucleus , and an outer , clearer , inclosing mass called ...
Стр. 5
... mass , and these projections are constantly changing , slowly pushing out or others believe that protoplasm exists as a foam work ; that it is a vis- cous liquid containing many fine globules ( the granule - appearing spots ) of a ...
... mass , and these projections are constantly changing , slowly pushing out or others believe that protoplasm exists as a foam work ; that it is a vis- cous liquid containing many fine globules ( the granule - appearing spots ) of a ...
Стр. 7
... mass can take in and digest food . The viscous , membraneless body simply flows about the food and absorbs it . Such of the food particles as can not be digested are thrust out of the body . The Amoeba breathes . Though we can not ...
... mass can take in and digest food . The viscous , membraneless body simply flows about the food and absorbs it . Such of the food particles as can not be digested are thrust out of the body . The Amoeba breathes . Though we can not ...
Стр. 9
... mass . The body of the Paramecium is indeed less primitive than that of the Amaba , and yet it is still but a single cell . The protoplasm of the body is very soft within and dense . on the outside , and it is covered externally by a ...
... mass . The body of the Paramecium is indeed less primitive than that of the Amaba , and yet it is still but a single cell . The protoplasm of the body is very soft within and dense . on the outside , and it is covered externally by a ...
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adaptation adult alimentary canal Amaba ants become bees birds butterfly called cavity chitin CLASS colony color complex animals composed conjugation crab crustaceans cytoplasm degeneration differentiation digestion divide ectoderm egg cells eyes fauna feed female fish flagella free-swimming function gastrula Globigerinæ habits hatched higher animals host Hydra inclosed increase individuals insects instinct intestine islands jelly-fishes kinds of animals larva larvæ layer live male mals mammals many-celled animals mass medusa mouth opening naturalists nerve nest nucleus ocean oesophagus one-celled outer oxygen Pandorina papillæ Paramecium parasites parent perform plants polyp prey primitive processes produced protective resemblance protoplasm Protozoa pseudopods queen Radiolaria reflex action reproductive cells Sacculina sea-anemone shape shell simple simplest animals single cell special sense species sperm cells spherical spiders sponge spores stage structure substance surface swimming tentacles tion vertebrates Volvox Vorticella wings workers worms young