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alimentary canal Amceba arteries attached auricle bees birds blood blood-vessels body bones brain branch burrows butterflies called capillaries carbon dioxide cavity cells cephalothorax Class color composed corpuscles crabs crayfish digestive diseases dorsal downy woodpecker eggs eyes feathers feed fibers fins fishes flowers frogs germs gills glands habits hair hairy woodpecker hatched heart heat hind honeybee individuals insects intestine kidneys larvae legs live lungs mammals membrane micronucleus microscope molluscs mosquito moth mouth muscles muscular nectar nerve nervous system nest Note observation ocean opening organs outer oxygen pair parasites pass plants pollen pond produced proteid protoplasm Protozoa pupae races region reptiles Sacculina shell side skeleton skin snakes species specimens spiders spinal stomach structure substances surface swim tail teeth tiny tissues toad tube veins ventricle vertebral column vertebrates Vorticella wild wings woodpeckers young
Page 501 - This textbook may be borrowed for two weeks, with the privilege of renewing it once. A fine of five cents a day is incurred by failure to return a book on the date when it is due. The Education Library is open from 9 to 5 daily except Saturday when it closes at 12.30.
Page 349 - He then slowly throws the weight of his body forward to bear upon his own arms and thus presses upon the thorax of the subject and forces air out of the lungs.
Page 426 - Myrmica, climbed on its back, and repeated the very same performance. Again it took toll and passed on to still another Myrmica. On looking about in the nest I observed that nearly all the Leptothorax workers were similarly employed.
Page 417 - ... she makes a derrick out of her body and proceeds with great skill and precision to drill a hole into the tree. When the pigeon horntail burrow is reached she deposits an egg in it.
Page 344 - Bronchi and lungs, posterior view, showing position of heart. 1, 1, summit of lungs; 2, 2, base of lungs; 3, trachea; 4, right bronchus; 5, branch to upper lobe of lung; 6, branch to lower lobe; 7, left bronchus; 8, branch to upper lobe; 9, branch to lower lobe; 10, left branch of pulmonary artery; 11, right branch; 12, left auricle of heart; 13, left superior pulmonary vein; 14, left inferior pulmonary vein; 15, right superior pulmonary vein; 16, right inferior pulmonary vein; 17, inferior vena...
Page 366 - Professor David Starr Jordan in the Popular Science Monthly, February, 1898, said: " The healthy mind stands in clear and normal relations with nature. It feels pain as pain. It feels action as pleasure. The drug which conceals pain or gives false pleasure when pleasure does not exist forces a lie upon the nervous system. The drug which disposes to reverie rather than to work, which makes us feel well when we are not well, destroys the sanity of life. All stimulants, narcotics, tonics, which affect...
Page 429 - ... which soon hatch feed on the pollen, grow, pupate, and issue as workers — winged bees a little smaller than the queen. These workers bring more pollen, enlarge the nest, and make irregular cells in the pollen mass, in each of which the queen lays an egg. She gathers no more pollen, does no more work except that of egg-laying. From these new eggs are produced more workers, and so on until the community may come to be pretty large. Later in the summer males and females are produced and mate....