What are the parts of respiratory system and their functions?

Answer 1

Nose -Inspiration and expiration usually occurs through the nose. The nose has main two functions: The cilia and hairs which line the nasal cavities trap dust and other foreign particles and the rich supply of blood surrounding the cavities warms the air before it enters the lungs.

Pharynx - allows for separation of food and air. The epiglottis closes the trachea when we eat and opens when we breathe.

Larynx - this structure sits on top of the trachea. Air rushing across two ligaments causes sounds that we shape into speech. Also called the voice box.

Trachea - Also called the windpipe Bronchi - the trachea branches into two forks each called a bronchi

Bronchioles - the smaller and smaller passageways that come off the bronchi

Alveoli - these are the small air sacs where actual gas exchange takes place.

Answer 2

The lung is the main part of the respiratory system. In the lungs oxygen is taken into the body and carbon dioxide is breathed out.

The trachea is sometimes called the windpipe. The trachea filters the air we breathe and branches into the bronchi.

The bronchi are two air tubes that branch off of the trachea and carry air directly into the lungs.

Breathing starts with a dome-shaped muscle at the bottom of the lungs called the diaphragm. When you breathe in, the diaphragm contracts. When it contracts it flattens out and pulls downward. This movement enlarges the space that the lungs are in. This larger space pulls air into the lungs. When you breathe out, the diaphragm expands reducing the amount of space for the lungs and forcing air out. The diaphragm is the main muscle used in breathing. the other parts are the lungs,oxygen,capillaries,nose,carbon dioxide,
The organs of the respiratory system responsible for conducting air include the nose/mouth, pharynx (throat), larynx (voicebox), trachea, and bronchi. The lungs themselves are responsible for gas exchange.
Lungs, Trachea, Nasal Cavity http://visual.merriam-webster.com/images/human-being/anatomy/respiratory-system/respiratory-system.jpg
Lungs, Trachea, Nasal Cavity
alveoli, bronchus, heart, larynx, lungs, mouth, nose, pharynx, trachea

Answer 3

Nasal Cavity- filters out particles and warms air

Palate- separates mouth and nasal cavity so breathing and eating can take place simultaneously

Epiglottis- covers the glottis when swallowing food

Larynx- vocal cords stretched across lumen, at the beginning of trachea

Trachea- windpipe, has semicircular cartilage rings which prevent it from collapsing.

Bronchus- division of the trachea into two, has cartilage rings

Bronchiole- further branching of the bronchus, has no cartilage rings

Alveoli- small air sacs only one cell thick where gas exchange takes place

Lungs- made of Bronchus, bronchiole and alveoli

Intercostal Muscles- move the rib cage, thus changing volume of thoracic cavity and causing inspiration and expiration (breathing in and out)

Sternum- attached to each pair of ribs

Pleural membrane- surround the lungs and thoracic cavity

Pleural fluid- moistens surfaces of membranes to prevent friction

Diaphragm- muscular structure separating abdominal cavity and thorax