Respiratory System

Respiratory system Lungs – provide the body with O2 and eliminates CO2 Right Lung 3 lobes Left Lung 2 lobes Pleura – membrane on the outside of the lung Parietal Pleura – outer layer Visceral Pleura – inner layer Plural Cavity – space b/w the 2 pleura

Lungs

Respiratory tract

Respiratory tract Nose Pharynx Larynx Trachea Right Lung Left Lung Bronchi Bronchioles Diaphragm Aveoli Capillaries Venule Arteriole Bronchiole

Two major tasks External Respiration (Breathing) – the exchange of air between the body and the outside environment Internal Respiration – the process of bringing O2 to the cells and removing CO2 from them

2 actions of external respiration Inhalation – breathing in Diaphragm contracts by flattening and the intercostal muscles raise the ribs; increases the space in the the thoracic cavity and air rushes in Exhalation – breathing out Diaphragm relaxes and the ribs lower, causing air to rush out

Upper respiratory system

Upper respiratory system Frontal Sinus Pharyngeal Tonsil - Adenoids Nostril Hard Palate Nasopharynx Uvula Palatine Tonsil Tongue Oropharynx Epiglottis Lingual Tonsil Laryngopharynx Larynx Esophagus Trachea

The throat / pharynx Three sections Nasopharynx Pharyngeal tonsils (adenoids) – aid in the body’s immune defense Oropharynx – triggers swallowing Palatine tonsils – part of the immune system Laryngopharynx – divides into 2 sections

esophagus Passageway for food Part of the GI tract Epiglottis prevents food from entering the larynx (glottis) What is the term for when food goes into the larynx instead of the esophagus? What is the procedure for dislodging food that is causing someone to choke?

The larynx (voice box) Air passes to the trachea Produces sounds of speech and singing Contain the vocal cords Size and thickness of the cords determine the pitch Supported by the thyroid cartilage

The trachea and lower lung passages Connects the larynx to the right and left bronchi Bronchi are the passageways through which air enters the lungs The bronchi are divided into smaller tubes called bronchioles

External respiration The air between the body and the outside environment is exchanged. What is another term for external respiration?

Terms you should know Internal Respiration External Respiration Oxygen is carried to and from the cells. What is removed from the cells? External Respiration The air between the body and the outside environment is exchanged. What is another term for external respiration? What is cilia?