The Student's Human Physiology. a First Year's Course in the Practice And Theory of the Subject
The book The Student's Human Physiology. a First Year's Course in the Practice And Theory of the Subject was written by author Evans, Ernest Here you can read free online of The Student's Human Physiology. a First Year's Course in the Practice And Theory of the Subject book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Student's Human Physiology. a First Year's Course in the Practice And Theory of the Subject a good or bad book?
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The high power can now be used, but a cover-glass should be placed between the web and object glass. Note (a.) the blood moves out of comparatively large vessels into smaller ones. These THE CIKCULATORY SYSTEM 113 are arteries, and (b) through small vessels which dis- charge into larger ones. The former are capillaries, and the latter veins. Make a sketch to show the cir- culation of the blood through the above vessels. THE EEGULATION OF THE BEAT OF HEART. — The rhythmical contraction of the he...art is due to the nature of the cardiac muscle, and not to the action of the lietvous system. This is shown by the heart of a chick beginning to beat long before any nervous system is developed ; and even the apex of the frog's heart is said to be without nerves, but it can contract if fed with serum when removed from the remainder of the heart. If the heart had no nerves and was not connected with the nervous system, it would probably beat always at the same rate. The requirements of the body under different conditions, such as when performing hard work or when asleep, do not always require the same amount of blood to pass through the capillaries.
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