Outlines of Zoology and Comparative AnatomyFannin, 1874 - Всего страниц: 150 |
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Стр. 78
... branchiæ , which are either deciduous or permanent , hence , they have been divided into the caduci - branchiata and perenni - branchiata ; true lungs are always present in the adult . There are always two occipital condyles for ...
... branchiæ , which are either deciduous or permanent , hence , they have been divided into the caduci - branchiata and perenni - branchiata ; true lungs are always present in the adult . There are always two occipital condyles for ...
Стр. 79
... branchiæ are present , in others both an internal and external set are developed ; the external branchiæ are the first to disappear , and subsequently , when the lungs are fully developed , the internal . In the perenni - branchiata the ...
... branchiæ are present , in others both an internal and external set are developed ; the external branchiæ are the first to disappear , and subsequently , when the lungs are fully developed , the internal . In the perenni - branchiata the ...
Стр. 80
... branchiæ , which disappear as the animal grows older , and breathes by means of lungs , one of which is smaller than the other . These curious animals are found in Java , Ceylon , Guinea , and South America , and were for a long time ...
... branchiæ , which disappear as the animal grows older , and breathes by means of lungs , one of which is smaller than the other . These curious animals are found in Java , Ceylon , Guinea , and South America , and were for a long time ...
Стр. 81
... branchiæ of the larvæ . The vertebral column is short ( there are only ten vertebræ in frogs ) , and the centra of ... branchiæ ; the external branchiæ first disappear , and subsequently , when the lungs are fully developed , the inter ...
... branchiæ of the larvæ . The vertebral column is short ( there are only ten vertebræ in frogs ) , and the centra of ... branchiæ ; the external branchiæ first disappear , and subsequently , when the lungs are fully developed , the inter ...
Стр. 88
... branchiæ , or gills , are composed of delicate leaflets , covered with a vascular mucous membrane , and are attached to the outer surface of a series of bones , termed the " branchial arches ; " these arches are usually four in number ...
... branchiæ , or gills , are composed of delicate leaflets , covered with a vascular mucous membrane , and are attached to the outer surface of a series of bones , termed the " branchial arches ; " these arches are usually four in number ...
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abdominal absent alimentary canal Amphibia animals aperture aquatic auricle Bimana birds bladder blood body bones bony branchiæ branchial calcareous called canines Carnivora caudal cavity cells cervical vertebræ Cetacea characters clavicle claws cloaca composed comprise contains coracoid covered dental formula Describe Digitigrade distinct divided dorsal vertebræ eldos external extremely feathers feet fins fishes five toes fore front furnished gills gland hind limbs homologous horny humerus incisors integument intestine larvæ legs lower jaw lumbar lungs Mammalia Mammals Marsupialia membrane molars mollusca Monotremata mouth muscles muscular nervous system nostrils order of Mammals organs pair peculiar pelvic arch pharynx placed Plantigrade plates possess posterior present Professor Owen Quadrumana reptiles Reptilia respiration ribs rudimentary Ruminants sacs scapula scapular arch shell single Sirenia situated skin skull soft spine sternum stomach sub-kingdom sub-order tail teeth termed terminates tooth transverse processes tubes Ungulata upper jaw ventricle vertebral column Vertebrata whales wing
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Стр. 17 - I believe that animals have descended from at most only four or five progenitors, and plants from an equal or lesser number. Analogy would lead me one step further, namely, to the belief that all animals and plants have descended from some one prototype. But analogy may be a deceitful guide. Nevertheless all living things have much in common, in their chemical composition, their germinal vesicles, their cellular structure, and their laws of growth and reproduction. We see this even in so trifling...
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Стр. 18 - Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth have descended from some one primordial form into which life was first breathed by the Creator.
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Стр. 123 - The sponge represents a kind of subaqueous city, where the people are arranged about the streets and roads in such a manner that each can easily appropriate his food from the water as it passes along.
Стр. 17 - Analogy would lead me one step farther, namely, to the belief that all animals and plants are descended from some one prototype. But analogy may be a deceitful guide. Nevertheless all living things have much in common, in their chemical composition, their cellular structure, their laws of growth, and their liability to injurious influences.
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Стр. 61 - In the hind limb of most birds there is a singular extensor muscle, which arises from the pubis, ends in a tendon which passes to the outer side of the knee-joint, and terminates in the leg by uniting with the flexor digitorum perforatus. The result of this arrangement is, that the toes are flexed whenever the leg is bent upon the thigh, and, consequently, the roosting bird is held fast upon his perch by the weight of his own body.