The respiratory system

Certainly! Here's a Quizlet on the respiratory system:

Terms:

1. Respiratory System: Organ system responsible for gas exchange in the body.

2. Nasal Cavity: Air enters here; lined with mucous membranes to filter and moisten air.

3. Pharynx: Throat region where air and food passages cross.

4. Larynx: Contains vocal cords; passage between pharynx and trachea.

5. Trachea: Windpipe; carries air to bronchi.

6. Bronchi: Two branches of trachea leading to lungs.

7. Lungs: Main organs of respiratory system; site of gas exchange.

8. Alveoli: Tiny air sacs in lungs where gas exchange occurs.

9. Diaphragm: Dome-shaped muscle below lungs; contracts to inhale and relaxes to exhale.

10. Inspiration: Breathing in; diaphragm contracts, chest cavity expands.

11. Expiration: Breathing out; diaphragm relaxes, chest cavity decreases.

Key Concepts:

- Gas Exchange: Process where oxygen is taken in and carbon dioxide is expelled.

- Ventilation: Movement of air in and out of the lungs.

- Respiration: Overall process of gas exchange in the body.

- Pulmonary Circulation: Blood flow between heart and lungs for oxygenation.

- Respiratory Control Center: Brain region regulating breathing rate and depth.

- Surfactant: Substance reducing surface tension in alveoli, aiding in inflation.

- Respiratory Disorders: Conditions affecting lungs and airways (e.g., asthma, COPD).

Feel free to use this Quizlet for studying or teaching about the respiratory system!