The respiratory system is a complex anatomical and physiological system responsible for the exchange of gases, primarily oxygen (O2) and carbon dioxide (CO2), between the body and the environment. Ventilation, which refers to the movement of air in and out of the lungs, is a crucial function of the respiratory system. To understand this system in detail, let's discuss its anatomy and physiology:
Anatomy of the Respiratory System:
1. Upper Respiratory Tract:
- Nose: The nose serves as the primary entry point for air. It filters, humidifies, and warms the incoming air.
- Pharynx: The pharynx is a shared pathway for air and food, connecting the nose and mouth to the larynx and esophagus.
2. Lower Respiratory Tract:
- Larynx (Voice Box): The larynx contains the vocal cords and plays a role in speech production. It also acts as a protective mechanism to prevent food or liquids from entering the lower airway.
- Trachea (Windpipe): The trachea is a tubular structure that carries air from the larynx into the chest. It is supported by C-shaped rings of cartilage.
- Bronchi and Bronchioles: The trachea divides into two main bronchi (right and left) which further branch into smaller bronchioles. These....
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