The heart, a hollow, muscular organ about the size of an adult clenched fist, weighs 10 to 12 oz (160 grams) in adult males and 8 to 10 oz in females. It is located in the thoracic cavity in the space between the lungs. Most of the heart lies just to the left of the midline of body (Fig. 15.1). It consists of four chambers: two atria and two ventricles. The atria are thin walled, the ventricles much thicker, particularly the left ventricle, which is the high-pressure chamber.
KeywordsAortic Valve Parasympathetic Nerve Cardiac Vein Intrinsic Regulation Semilunar Valve
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- Altman PL, Dittmer DS (1974) Biology data book, 2nd edition, Vol. III. Fed Amer Soc Exper BiolGoogle Scholar
- Berne RM, and Levy MN (1977) Cardiovascular physiology. Mosby, St. LouisGoogle Scholar
- Guyton AC (1977) Basic human physiology. Saunders, PhiladelphiaGoogle Scholar
- Guyton AC, Young DB (1978) Cardiovascular physiology III, International Review of Physiology, Vol. 18. University Park Press, BaltimoreGoogle Scholar
- Jensen D (1971) Intrinsic cardiac rate regulation. Appleton-Century Crofts, New YorkGoogle Scholar
- Little RC (1977) Physiology of the heart and circulation. Year Book Medical, ChicagoGoogle Scholar
- Selkurt EE (1975) Basic physiology for the health sciences. Little, Brown, BostonGoogle Scholar
- Sturkie PD (1976) Avian physiology, Chap. 5, Springer Verlag, New YorkGoogle Scholar