Respiratory System Overview
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Questions and Answers

What is the primary function of the respiratory system?

  • To regulate body temperature
  • To bring oxygen into the body and remove carbon dioxide (correct)
  • To circulate blood throughout the body
  • To produce energy for the body

What is the tube that connects the nose and mouth to the lungs?

  • Pharynx (correct)
  • Larynx
  • Bronchi
  • Trachea

What is the muscle that helps with breathing and separates the chest cavity from the abdominal cavity?

  • Hemoglobin
  • Trachea
  • Larynx
  • Diaphragm (correct)

What happens during inhalation?

<p>Diaphragm contracts and rib cage expands (C)</p> Signup and view all the answers

What is the process by which oxygen and carbon dioxide are exchanged in the lungs?

<p>Gas Exchange (A)</p> Signup and view all the answers

What is the role of the alveoli in the lungs?

<p>To exchange oxygen and carbon dioxide (B)</p> Signup and view all the answers

Study Notes

Overview of the Respiratory System

  • The respiratory system is a biological system that brings oxygen into the body and removes carbon dioxide.
  • It is essential for cellular respiration and energy production.

Organs of the Respiratory System

  • Nose and Mouth: air enters the body through the nose or mouth.
  • Pharynx (Throat): air passes through the pharynx, which is a tube that connects the nose and mouth to the lungs.
  • Larynx (Voice Box): air passes through the larynx, which contains the vocal cords.
  • Trachea (Windpipe): air passes through the trachea, a tube that divides into two bronchi.
  • Bronchi: tubes that branch off from the trachea and lead to the lungs.
  • Lungs: organs that exchange oxygen and carbon dioxide through the process of respiration.
  • Diaphragm: a dome-shaped muscle that separates the chest cavity from the abdominal cavity and helps with breathing.

Mechanism of Breathing

  • Inhalation: diaphragm contracts, rib cage expands, and air enters the lungs.
  • Exhalation: diaphragm relaxes, rib cage descends, and air leaves the lungs.

Gas Exchange

  • Oxygen: enters the blood through the alveoli (small air sacs in the lungs) and binds to hemoglobin in red blood cells.
  • Carbon Dioxide: leaves the blood through the alveoli and is exhaled out of the body.

Functions of the Respiratory System

  • Brings oxygen into the body
  • Removes carbon dioxide from the body
  • Helps regulate pH levels in the body
  • Plays a role in speech and vocalization

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Test your knowledge of the respiratory system, its organs, mechanism of breathing, and functions. Learn how the body brings oxygen in and removes carbon dioxide.

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