. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 35 FIRST GREAT DIVISION OF THE ANIMAL KINGDOM. THE VERTEBRATE ANIMALS. The bodies and limbs of these being supported by a frame-work composed of connected pieces moveable upon each other, they have the more precision and vigour in their movements : the solidity of this support permits of their attaining considerable size, and it is among them that the largest animals are found. Their more concentrated nervous system, and the greater volume of its cen
. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 35 FIRST GREAT DIVISION OF THE ANIMAL KINGDOM. THE VERTEBRATE ANIMALS. The bodies and limbs of these being supported by a frame-work composed of connected pieces moveable upon each other, they have the more precision and vigour in their movements : the solidity of this support permits of their attaining considerable size, and it is among them that the largest animals are found. Their more concentrated nervous system, and the greater volume of its central portions, impart more energy and more stability to their sentiments, whence result superior intelligence and perfectibility. Their body always consists of a head, trunk, and members. The head is formed by the cranium, which incloses the brain, and by the face, which is composed of the two jaws and the receptacles of the organs of sense. Their trunk is supported by the spine of the back and the ribs. The spine is composed of vertebrae moveable upon each other, of which the first supports the head, and which have an annular perforation, forming together a canal, wherein is lodged that medullary production from which the nerves arise, and which is called the spinal marrow. The spine, most commonly, is continued into a tail, extending beyond the hinder limbs. The ribs are semicircles, which protect the sides of the cavity of the trunk : they are articulated at one extremity to the vertehne, and are ordinarily attached in front to the breast-bone; but sometimes they only partly encircle the trunk, and there are genera in which they are hardly visible. There are never more than two pairs of limbs; but sometimes one or the Other is wanting, or even both : their forms vary according to the movements which they have to execute. The anterior limbs may be organized as hands, feet, wings, OT fins; the posterior aa feet, or instruments for swimmini i) 2. Fig. Please note that these
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectzoology, bookyear1854
