RESPIRATORY SYSTEM OVERVIEW
The respiratory system is responsible for the exchange of gases
(oxygen and carbon dioxide) between the body and the
environment. This system includes the lungs, airways, and
respiratory muscles. The process of respiration involves ventilation
(air movement in and out of the lungs), gas exchange, and oxygen
delivery to tissues.
, Functions of the Respiratory System
Gas Exchange: Oxygen is absorbed into the blood, and carbon
dioxide is removed from the blood.
Regulation of Blood pH: The respiratory system helps maintain the
acid-base balance by adjusting the levels of carbonic acid in the
blood.
Protection: The respiratory system filters, warms, and humidifies the
air. It also has defense mechanisms such as ciliary action and mucus
production.
Voice Production: The larynx (voice box) is essential for speech.
Olfaction: The nasal cavity is involved in the sense of smell.
Anatomy of the Respiratory System
1. Upper Respiratory Tract
Nose and Nasal Cavity: Filters, warms, and moistens air.
Pharynx (Throat): Passageway for air, food, and liquids.
Larynx (Voice Box): Contains vocal cords and regulates airflow to the
lower respiratory tract.
2. Lower Respiratory Tract
Trachea (Windpipe): Main airway that leads to the lungs.
Bronchi: The trachea divides into the left and right bronchi, which
then divide further into bronchioles.
Lungs: Main organs of gas exchange.
The respiratory system is responsible for the exchange of gases
(oxygen and carbon dioxide) between the body and the
environment. This system includes the lungs, airways, and
respiratory muscles. The process of respiration involves ventilation
(air movement in and out of the lungs), gas exchange, and oxygen
delivery to tissues.
, Functions of the Respiratory System
Gas Exchange: Oxygen is absorbed into the blood, and carbon
dioxide is removed from the blood.
Regulation of Blood pH: The respiratory system helps maintain the
acid-base balance by adjusting the levels of carbonic acid in the
blood.
Protection: The respiratory system filters, warms, and humidifies the
air. It also has defense mechanisms such as ciliary action and mucus
production.
Voice Production: The larynx (voice box) is essential for speech.
Olfaction: The nasal cavity is involved in the sense of smell.
Anatomy of the Respiratory System
1. Upper Respiratory Tract
Nose and Nasal Cavity: Filters, warms, and moistens air.
Pharynx (Throat): Passageway for air, food, and liquids.
Larynx (Voice Box): Contains vocal cords and regulates airflow to the
lower respiratory tract.
2. Lower Respiratory Tract
Trachea (Windpipe): Main airway that leads to the lungs.
Bronchi: The trachea divides into the left and right bronchi, which
then divide further into bronchioles.
Lungs: Main organs of gas exchange.
