vet tech ch 9

What is the main function of the respiratory system?

The respiratory system brings oxygen from the air into the body for delivery via blood to the cells and removes carbon dioxide.

What is ventilation?

Ventilation is the process of bringing in fresh air, also known as breathing.

what are the two main divisions of the respiratory system?

The upper respiratory tract and the lower respiratory tract.

What structures are part of the upper respiratory tract?

• Nose

• mouth

• pharynx

• epiglottis

• larynx.

what structures are part of the lower respiratory tract?

• Trachea

• bronchial tre

• lungs.

What are the external openings of the nose called?

Nares

what are nasal turbinate’s and their functions?

Warm-blooded animals have nasal turbinates that warm, humidify, and filter inspired air.

what are the functions of sinuses?

Sinuses provide mucus, make bones lighter, and help produce sound.

what are the three divisions of the pharynx?

• Nasopharynx

• Oropharynx

• Laryngopharynx.

what is the function of the larynx?

The larynx, or voice box, contains the vocal cords and is located between the pharynx and the trachea.

what is the trachea commonly called?

the windpipe

what do bronchi branch into ?

The bronchi continue to get smaller in diameter until they become bronchioles.

where does gas exchange occur in the lungs?

Gas exchange occurs in the alveoli.

what are the combining forms of lung?

• Pneum/o

• pneumon/o

• pneu

• pulm/o

• pulmon/o.

what is the diaphragm?

The diaphragm is a muscle that separates the thoracic and peritoneal cavities and plays a key role in breathing.

Dia- means-

across

what does the root “-pnea” refer to?

It refers to breathing.

what does “hypoxia” mean?

Hypoxia refers to low oxygen levels in the body.

Capn/o refers to what

carbon dioxide