Respiration yurr

Sinus cavities

Air-filled spaces named maxillary, frontal, ethmoidal, and sphenodial

Trachea

Separates the upper airway and lower airways - each ring is about 5 inches made of cartilage for strength

Nasoparynx

Back of the nose

Epiglottis

Doorway to the trachea - opens to let in, closes to keep food and fluid out

nares

nostrils

pleurae

Membranes covering the lungs - Intrapleural is the space between the two membranes: visceral covering the lungs and parietal pleura which lines the inner wall of the thorax

upper airway

the mouth, nose, sinuses, and pharynx

Alveoli

microscopic-sized air sacs - 300 million per lung, 600 million in both lungs

Inhalation

Inspiration “breathing in”

oropharynx

back of the mouth

Lower airway

The bronchi and lungs - flaws down the trachea to the bronchi

Nasal septum

Divides the nasal passages into left and right sides

Lobes

Division of the lungs; the right has three, and the left has two - The left has less because it needs to make room for the heart

recoil

The elastic quality that allows the lungs to expand and contract

hard plate

divides the nasal cavity from the mouth

Cilia

Tiny hairs within the nasal cavity - Move in a wave likeaction to propel debris outward

pH scale

A tool for measuring the acidity or alkalinity of a substance

Larynx

Vibrates to create sound when we talk

Exhalation

Expiration

pleural fluid

Fluid between the visceral and parietal pleurae that acts as a sort of lubricant