What are the three main parts of the human respiratory system?

Answer 1

The main structures of the respiratory system are:

• mouth
• nose
• pharynx (throat)
• larynx (vocal cords)
• trachea (windpipe)
• bronchi (singular is bronchus; these are the two smaller tubes that are branches of the trachea)
• bronchioles (even smaller tubes off of the bronchi)
• lungs
• alveoli (singular is alveolus; these are tiny sacs on the bronchioles that are surrounded by blood vessels that allow oxygen into the blood)

Answer 2

The respiratory system consists of the nose, pharynx, (throat), larynx, (voice box) trachea (windpipe), bronchi, and lungs.

Structurally the respiratory system consists of two regions.

1. The upper respiratory system which includes the nose pharynx, and associated structures
2. The lower respiratory system which includes the larynx, trachea, bronchi, and lungs.

It has three main functions

1. Provides gas exchange for intake of O2 and elimination of CO2
2. helps regulate blood pH
3. contains receptors for the sense of smell, filters air and produces sounds for vocalization. well there are more than 2 parts but id say that the main 2 are lungs and nose.

Answer 3

Theres more than just 3 structures, theres the Nose, Pharynx, Larynx, Trachea, Bronchi, and the Lungs...Thanx for reading.. And these are the right right answers because I got it from my science textbook...

---Jane.

Answer 4

The respiratory system is made up of the trachea, bronchi, bronchioles, lungs, and the diaphragm. This system is what allows humans to take in oxygen.

Answer 5

The three main structures are the trachea, bronchi and the lungs.

Answer 6

nose, pharynx, trachea, bronchi, and lungs