Respiratory System Flashcards
Which statement is true regarding gas concentration of blood leaving the left side of the heart?
The oxygen levels are high
Oxygen rich blood is blood that
Flows into systemic circulation
What are the three functional categories of respiratory muscles?
The diaphragm, rib cage muscles, and abdominal muscles
What is the anatomy of the respiratory system?
Nose
Throat-Pharynx
Voice box-Larynx
Windpipe-Trachea
Bronchi
Lungs
Alveolar duct
Alveoli
What is the role of the respiratory system?
Provides oxygen to the bloodstream
Expels carbon dioxide from the bloodstream
What are the mechanics of breathing?
The first phase is called inspiration, or inhaling. When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward.
The second phase is called expiration, or exhaling. When the lungs exhale, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases.
What is the gas exchange process?
The transfer of oxygen from the air into the bloodstream and the removal of carbon dioxide from the bloodstream into the air. This happens in the lungs.
What is the difference between internal respiration and external respiration?
Internal respiration occurs in the body tissues, where cells release carbon dioxide and take in oxygen from the blood. External respiration occurs in the lungs or gills and occurs when the body takes in oxygen from the atmosphere and releases carbon dioxide.
