Answered: How does the heart works

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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How does the heart works?

Expert Solution

Step 1

Location of heart :- Heart is a mesodermal origin. It is located in the thoracic (chest) cavity(under the rib cage), in between the two lungs (slightly tilted to the left lung), behind the sternum and above the diaphragm. Heart is protected by a double walled pericardium membrane filled with pericardium fluid which protects the heart and reduces friction between the layers.

Size of heart :- It is the size of a clenched fist(curl fingers of hand tightly). At early age heart size is the same as the clenched fist size but at adults it is slightly larger than the clenched fist. Weight is 250-300 gram.

Shaped :- It is shaped like an inverted cone or upper side down pear shaped.