Heart rate is controlled by the SA node, a patch of cells on the heart. Respiratory rate, on the other hand, is controlled by the respiratory center of the medulla oblongata.  Why isn’t control of respiratory rate housed in the lungs themselves? (hint: think of muscles involved

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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  1. Heart rate is controlled by the SA node, a patch of cells on the heart. Respiratory rate, on the other hand, is controlled by the respiratory center of the medulla oblongata.  Why isn’t control of respiratory rate housed in the lungs themselves? (hint: think of muscles involved in each process.
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The respiratory center is made up of three major respiratory groups of neurons, two in the medulla and one in the pons region. The lungs themselves are passive during the act of breathing.

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