. Elementary biology, animal and human. Biology. 132 ANIMAL BIOLOGY. Fig. 99. - Diagram of the circula- tion of a fish. The blood passes from the capillaries into the veins,* which are thinner-vailed than the arteries. These veins carry the blood back to the heart. The heart (Fig. 100) consists of two principal parts; a thin- walled auricle which receives blood from the veins, and a thick-walled, muscular portion called the ventricle, which forces the blood out into the arteries. 100. Adaptations for breath- ing. — Laboratory study. 1. Raise the gill covers of a preserved fish and find the gil
. Elementary biology, animal and human. Biology. 132 ANIMAL BIOLOGY. Fig. 99. - Diagram of the circula- tion of a fish. The blood passes from the capillaries into the veins,* which are thinner-vailed than the arteries. These veins carry the blood back to the heart. The heart (Fig. 100) consists of two principal parts; a thin- walled auricle which receives blood from the veins, and a thick-walled, muscular portion called the ventricle, which forces the blood out into the arteries. 100. Adaptations for breath- ing. — Laboratory study. 1. Raise the gill covers of a preserved fish and find the gills. Carefully separate the gills with the forceps. How many gills are present on each side ? 2. The openings between the gills are called gill Gently push a thin strip of wood or the forceps through one of the gill clefts as far as you can. a. In what cavity do the forceps or strip of wood appear ? 1 This is true of all organs of the fish, excepting the gfills. See 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 Peabody, James Edward, b. 1869; Hunt, Arthur Ellsworth, joint author. New York, The Macmillan company
Size: 882px × 2832px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1912
