Anatomy Flashcards
What is the structure of the right lung?
It has three lobes - Upper, middle, lower.
It consists of more vertical bronchus - so that air and other inhaled particles are more likely to go into the right lung.
What is the structure of the left lung?
It has two loves - Upper and lower.
It has more angled bronchus due to the position of the heart.
What is the pharynx?
A funnel shaped passage that connects the nasal cavity to the larynx.
It has three divisions - the nasopharynx, the oropharynx and the laryngopharynx.
It is composed of skeletal muscles that are lined by the mucous membrane.
What is the larynx?
This connects the pharynx to the trachea.
It is a framework of cartilage and dense connective tissue.
The opening (glottis) is closed by epiglottis or vocal folds.
What is the trachea?
It is a flexible cylindrical tube that is composed of 16-20 āCā shaped rings of incomplete cartilage.
It divides inferiorly into two primary bronchi
What is the structure of the bronchi?
The trachea divides into right and left main bronchi.
The bronchi then divide into bronchioles which terminate in the alveoli.
What is the gross structure of the respiratory system? (from the outside to inside)
- Skin
- Musculature
- Rib Cage (Ribs, Thoracic Spine, Sternum)
- Diaphragm
- Pleura (Paretial and visceral layers)
- Lungs
What is the function of the respiratory system?
To provide the body tissues with oxygen for energy production at a cellular level.
To remove the carbon dioxide from the body.
What happens to the lungs when a person breathes in?
The diaphragm flattens and moves downwards, pushing the contents of the abdomen down and moving the lower ribs out.
(External intercostal occurs, which pulls the lower ribs upwards and outwards.)
(Negative pressure between the pleura ensures that the lung is pulled outwards as the chest wall is moved out by muscle contraction)
(The shape of the rib cage and joints facilitate the movement of the thoracic cage).
