RESPIRATORY SYSTEM Flashcards
Four steps of respiration
Ventilation,External respiration,Gas transport and Internal respiration
the movement of the thorax and certain muscles that cause air to go in and out of our lungs
Ventilation
O2 enters the blood in the lungs and CO2 exits the blood in the lungs
External respiration
CO2 and O2 are circulated in the blood to and from the tissues.
Gas transport
Gas exchange involves the exit of O2 from blood to move into the tissues, while CO2 exits the tissues to enter the blood
Internal respiration
Functions of Respiratory System
Regulation of blood pH, Production of chemical mediators, Voice production ,Olfaction, Protection
It can alter the blood pH by changing blood CO2 levels
Regulation of blood pH
Lungs produces an enzyme called angiotensin-converting enzyme (ACE). which is an important component of blood pressure regulation
Production of chemical mediators
Air moving past the vocal folds makes sound and speech possible.
Voice production
The sensation of smell occurs when airborne molecules are drawn into the nasal cavity.
Olfaction
It provides protection against some microorganisms by preventing them from entering the body and removing them from respiratory surfaces.
Protection
There are seven structures that make up the respiratory system
external nose, the nasal cavity, the pharynx, the larynx, trachea, bronchi, and lungs.
respiratory system can be classified in two ways:
structurally and functionally.
Upper Respiratory Tract are compose of
nose, Nasal Cavity, Pharynx (Throat), Larynx (Voicebox)
Is the visible structure that forms a prominent feature of the face. It allows air to enter your body, then filters debris and warms and moistens the air.
nose
Is the open chamber inside the nose where the air first enters the respiratory system.
nasal cavity
Is the common opening of both the digestive and the respiratory system. It receives air from the nasal cavity and receives air, food, and drink from the oral cavity.
Pharynx (Throat)
It prevents swallowed materials from entering the lower respiratory tract and regulates the passage of air in and out of the lower respiratory tract.
Larynx (Voicebox)
Lower Respiratory Tract are
Trachea (Windpipe) , Bronchi (Branches of trachea) and Lungs
Allows air to flow into the lungs.
Trachea (Windpipe)
It is the main passageway and carries air into the lungs
Bronchi (Branches of trachea)
The principal organ of respiration, and on a volume basis they are the largest organs in the body.
Lungs
responsible for respiratory movements.
Diaphragm
Functionally, it is divided into two regions:
conducting zone and respiratory zone