Respiratory System

3. The trachea, also known as the windpipe, is a 4-5 inch long rigid tube that carries air from the larynx to the bronchial tree of the lungs
9. Tree: The bronchial tree is a network of tubes that conduct air into the lungs
11. The larynx is a structure made mainly of cartilage that connects the pharynx and trachea and serves as a passageway for air and for the production of sound
14. Inspiration brings air into the lungs by increasing the volume of the thorax
15. The lungs are a pair of soft, cone-shaped organs that occupy most of the space in the thoracic cavity
16. The trachea, also known as the windpipe, is a 4-5 inch long rigid tube that carries air from the larynx to the bronchial tree of the lungs
18. The lungs contain over 500 million alveoli, which are microscopic air sacs at the ends of the Bronchioles
20. rings: The tube is held open by a C-shaped cartilage rings

1. The nasopharynx is the part of the pharynx behind the nasal cavity
2. cavity: The internal part of the nose, called the nasal cavity
4. a result, they contain numerous branching air passages, blood vessels, and millions of tiny air sacs called
5. The small opening to the larynx is called the glottis
6. The pharynx serves as a common passageway for both the respiratory and digestive systems
7. Bronchioles: They continue to subdivide into the smallest passages, the terminal bronchioles
8. Each lung is divided into smaller units called lobes separated by folds of lung tissue called fissures
10. cells: The ciliated cells filter the air of particles, trapping them and brushing them upwards to the pharynx to be swallowed
12. is the normal pathway for air to enter and exit the respiratory system
13. conchae: The Nasal conchae is divided into 3 passageways called nasal conchae, which are lined with mucous membranes
17. Expiration lets air flow out of the lungs by decreasing the volume of the thorax
19. While the oropharynx is the part behind the mouth that connects nose and mouth