Respiratory System Module 3 Flashcards
Movement of air into and out of lungs is called
Respiration or Pulmonary Respiration
Describe Respiration (in terms of O2/CO2)
O2 is obtained from the environment and delivered to cells and CO2 is transported from the cells to the environment
Takes place in the lungs (Diffusion of O2 into the bloodstream from the air in the lungs and diffusion of CO2 out of the blood stream to the air in the lungs)
External exchange of gases / Point of Pulmonary Circulation
Takes place in the tissues (Diffusion of O2 into the cells from the blood stream and diffusion of CO2 out of the cells and into the bloodstream)
Internal exchange of gases / Point of Systemic Circulation
Structures located outside the thoracic cavity
(Upper respiratory tract) Nose Pharynx Larynx Trachea
Structures located inside the thoracic cavity
(Lower respiratory tract)
Bronchi
Lungs
Nasal cavities are separated by the
Septum
Nasal cavities are lined with
Mucous membrane
Nasal conchae …
increases surface area and helps warm and humidify air
What are the functions of the mucous membrane
Warms air
Humidifies air
Traps foreign particles
Olfactory receptors
The opening of the nasal cavities are called
Nares
The throat is considered the
Pharynx
The superior portion of the pharynx located posterior to the nasal cavities is called the
Naso-Pharynx
The eustachian tubes…
open into the naso-pharynx and equalize on both ear drums
The extension of the palate that closes the naso-pharynx during swallowing
Uvula
The middle portion of the pharynx, located posterior to the oral cavity contains the palatine and lingual tonsils
Oro-pharynx
The inferior portion of the pharynx that opens anteriorly to the larynx and posteriorly to the esophagus
Laryngeal pharynx (opens to two different tubes)
Separates oral cavity and nasal cavity
Palate
The voice box also called the
Larynx
Cartilaginous structure that closes the larynx during swallowing
Epiglottis (Top of glottis)
Vibrates when air moves past them producing sound
Vocal cords
The space between two tubes is called the
Glottis
Forms the bulk of the anterior wall of the larynx, and serves to protect the vocal folds (“vocal cords”), which are located directly behind it.
Thyroid cartilage
Open areas in some of the bones in our skull, lined with mucous membrane and empties into the nasal cavity
Sinuses
Makes skull lighter, extra surface and are lined with mucous membrane, and adds quality to voice
Para-nasal sinus
Extends from the larynx to the upper part of the thoracic cavity. It is anterior to the esophagus. Has C-shaped cartilages to keep it open
Trachea
The trachea is Lined with pseudostratified ciliated columnar epithelium that is (size)
4-5 inches long 1 inch in diameter
Each main stem bronchus enters a lung at the
Hilus
Describe the bronchi
Main stem bronchus divides into secondary bronchi which divide into BRONCHIOLES which keep subdividing an getting progressively smaller referred to as the BRONCHIAL TREE
Decreases heart rate
Vagus Nerve
Main stem bronchi is referred to as the
Main stem bronchi
Ends at the alveolus
Alveolar duct
Extends from the clavicles to the diaphragm
Lungs
Right lung has how many lobes
3
Left lung has how many lobes
2
Lung tissue is very
elastic
Gets two layers to stick together
Pleural fluid
The functional units of the the lungs are the
alveoli
Site of gas exchange
alveoli
Surrounds the alveolus to allow it to conduct gas exchange
pulmonary capillaries
Respiratory muscles and Compliance are dependants of
Ventilation
What are the phases of pulmonary venilation
Inhalation and Exhalation
The capacity of the lungs to expand and contract is called
Compliance
CPR is an example of
Positive pressure
Nerve that originates in the neck and passes down between the lung and heart to reach the diaphragm. It is important for breathing, as it passes motor information to the diaphragm and receives sensory information from it.
Phrenic nerve
Considered the active phase of breathing intercostals CONTRACT making thoracic cavity larger
Inhalation (Diaphragm moves up Rib cage moves down)
Considered the passive phase of breathing intercostals RELAX making thoracic cavity smaller
Exhalation