Anatomy: Unit E Respiratory system

Respiratory System

Exchanges oxygen and carbon dioxide with environment.

Cardiovascular System

Transports gases throughout the body.

Conducting Zones

Warms, humidifies, and filters incoming air.

Respiratory Zones

Site of gas exchange in the lungs.

Mouth

Entry point for air into the respiratory system.

Nose

Filters and humidifies inhaled air.

Throat

Common passage for air and food.

Lungs

Organs where gas exchange occurs.

Bronchi

Branches from trachea leading to lungs.

Alveoli

Air sacs where gas exchange occurs.

Nasopharynx

Upper pharynx connecting nasal cavity and throat.

Oropharynx

Middle pharynx connecting mouth and throat.

Laryngopharynx

Lower pharynx connecting larynx and throat.

Larynx

Voice box separating respiratory and digestive tracts.

Epiglottis

Flap protecting trachea during swallowing.

Thyroid Cartilage

Largest cartilage forming the Adam's apple.

Cricoid Cartilage

Connects larynx to trachea, supports vocal cords.

Trachea

Rigid tube directing air to lungs, 5 inches long.

Esophagus

Tube transporting food to the stomach.

Bronchioles

Smaller air passages branching from bronchi.

Surfactant

Liquid preventing alveolar sacs from collapsing.

Right Lung

Contains 3 lobes for gas exchange.

Left Lung

Contains 2 lobes and cardiac notch.