. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. PHYSIOLOGY OF THE NERVOUS SYSTEM. 767 cells connected together to receive and convey impression (Fig. 321). It consists of a ring around the mouth composed of five ganglia of equal size with radiating nerves. From this circle delicate fibres may be traced into the different rays. In lower zoophytes all traces of the nervous system is wanting, and in them the functions of nutrition are accom- plished through the operations of undifferentiated pr
. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. PHYSIOLOGY OF THE NERVOUS SYSTEM. 767 cells connected together to receive and convey impression (Fig. 321). It consists of a ring around the mouth composed of five ganglia of equal size with radiating nerves. From this circle delicate fibres may be traced into the different rays. In lower zoophytes all traces of the nervous system is wanting, and in them the functions of nutrition are accom- plished through the operations of undifferentiated protoplasm. In the mollusks the nervous system has reached a somewhat higher form of development, and two or more ganglia are found located around the gullet and communicating by nerve-fibres with other ganglia in dif- ferent regions of the body, sending off nerves to the different organs. Usually in the mollusks there is a cir- cular ganglion located in the cephalic n^ side of the animal and two abdominal ganglia placed below the oesophagus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Robert Meade, 1854-. Philadelphia and London, F. A. Davis
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiol, bookyear1890
