The respiratory system is a network of organs and tissues that aid in breathing. It consists of your airways, lungs, and blood vessels. The respiratory system includes the muscles that power your lungs. These components work together to transport oxygen throughout the body and remove waste gases such as carbon dioxide.

Alveoli are air sacs and functional respiratory sites with a dense network of blood capillaries for excellent gas exchange.

The trachea is the passageway that connects your throat and lungs.

Elastic cartilage provides moderate elasticity in support. It is mostly found in the larynx, the external part of the ear (pinna), and the tube that connects the middle of the ear to the throat (eustachian or auditory tube).

References:
Cleveland Clinic. (n.d.). Respiratory System. Retrieved from https://my.clevelandclinic.org/health/articles/21205-respiratory-system

has_geek. (2020). Respiratory System – Air Passage Ways, Pharynx and Larynx, Lung Capacities. Retrieved from https://www.guyhowto.com/the-respiratory-system/#:~:text=In%20humans%2C%20the%20respiratory%20system%20consists%20of%20air,network%20of%20blood%20capillaries%20for%20excellent%20gas%20exchange.

Watkins, J., et al. (2009). The Pocket Podiatry Guide: Functional Anatomy. Retrieved from https://www.sciencedirect.com/science/article/pii/B9780702030321000044