Respiratory System Quiz Flashcards
Functions of the Respiratory System?
Exchanging respiratory gases between the blood and external environment.
(Works with the Cardiovascular System)
Nasal Cavity
Nose
Divided into the left and right sides by the nasal septum.
Lined with Ciliated mucosa.
air gets warmed, filtered, and moistened.
Nasal Conchae
bones that divide the nasal cavity.
supports the mucus membrane and increases the surface area
Pharynx
Also known as the throat.
Divided into three sections: nasopharynx,oropharynx, and laryngopharynx.
Air is diverted away from the esophagus/stomach and into the lungs
Epiglottis
A flexible flap of cartilage at the superior end of the larynx,
During the action of swallowing, this flap bends downward to cover the opening of the airway, allowing food and liquids to enter the esophagus.
Larynx
Also known as the voice box
Inferior to the pharynx
Composed of 8 rigid pieces of cartilage.
Houses the vocal cords.
Trachea
Also known as the windpipe.
Supported by C-shaped rings of cartilage.
Ciliated epithelial cells line the trachea, contributing to the cleansing of incoming air.
Bronchi
The trachea divided into the left and right primary bronchi
Each bronchus divides into smaller branches that carry air throughout the lungs.
Primary bronchi
Air enters the lungs from the trachea
Secondary Bronchi
air traveling from the primary bronchi enters into the lobes of the lung.
Tertiary Bronchi
Where air enters after traveling through the secondary bronchi
Terminal Bronchi
Where air enters after traveling through the tertiary bronchi, the end-tails of the bronchial tree.
Bronchial Tree
In each lung, the primary bronchi branch into smaller sna smaller airways, forming this structure. End into clusters of air sacs- alveoli
Lungs
Spongy Tissue that sit within the pleural cavity.
Right side=3 lobes
Left side= 2 lobes
Consists of a cardiac notch-the space for the heart
Pleural Membranes
The surface of each lungs covered in visceral pleural and parietal pleura. Lubricates the lungs during breathing.
Alveoli
Thin-walled air sacs that make up the bulk of lung tissue
Gas exchange occurs by simple diffusion through the respiratory membrane
Surfactant
An oily secretion that forms a superficial coating on the alveolar surface, reducing surface tension.
Without this oily secretion, the delicate alveolar walls wound collapse.
Nasopharynx
Top part of the throat
Oropharynx
The middle part of the throat, behind the mouth
Laryngopharynx
The lower part of the throat that is a crucial connection point through which food, water, and air pass
Events during expiration
Inspiratory muscles relax
Size of thoracic cavity decreases
Pressure increases.
Air flows out of the lungs from the area of higher pressure to the environment that is a lower pressure.
Diaphragm goes up
Events during inspiration
Inspiratory muscles contract
Size of Thoracic cavity increases/volume increases
Pressure is reduced(decreases)
Air flows into the lungs from an area of higher pressure to the body, which has an area of low pressure
The diaphragm moves downward.
Respiratory Capacity
How much air moves into and out of the lungs under different conditions
Affected by size, age, biological sex, and physical condition
Tidal volume
The amount if air that moves into and out of the lungs during normal quiet breathing