. Animal biology; Human biology. Parts II & III of First course in biology. Biology. FIG. BRAIN (cerebrum, cerebellum, medulla). sometimes called the vital knot, because although the cerebrum and cerebellum may be removed from an animal without causing immediate death, the slightest injury to the vital knot kills the animal at once. In cases of hanging, death is caused by injury to this center. Automatic The center called the vital knot is said to regulate the breathing automatically, not reflexly. Reflex acts start in the skin ; automatic acts start in the interior of th
. Animal biology; Human biology. Parts II & III of First course in biology. Biology. FIG. BRAIN (cerebrum, cerebellum, medulla). sometimes called the vital knot, because although the cerebrum and cerebellum may be removed from an animal without causing immediate death, the slightest injury to the vital knot kills the animal at once. In cases of hanging, death is caused by injury to this center. Automatic The center called the vital knot is said to regulate the breathing automatically, not reflexly. Reflex acts start in the skin ; automatic acts start in the interior of the body. The condition of the blood regulates the breathing automatically during sleep, and partly regulates it during waking. If too much carbon dioxid accumulates in the blood this excites the vital knot, which sends out stronger impulses to the respiratory muscles. Deeper breathing follows, which purifies the blood, and the breathing is then. FIG. in. — ASSOCIATION FIBERS, con- necting cells within the cerebrum. (Jegi.). 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1910
