The Respiratory System Flashcards
Primary Function of the nose
exchanges air during inhaling and exhaling; warms, moisturizes and filters inhaled air
primary function of the sinuses
produce mucus for the nasal cavities, make bones of the skill lighter, aid in sound production
primary function of the pharynx
transports air back and forth between the nose and the trachea
primary function of the larynx
makes speech possible
primary function of the trachea
transports air back and forth between the pharynx and the bronchi
alveoli
very small grape-like structures found at the ends of the bronchioles; air sacs that exchange gases with the pulmonary capillary blood
primary functions of the lungs
brings oxygen into the body, and removes carbon dioxide and some water waste from the body
functions of the respiratory system (4)
deliver air to lungs, convey oxygen from the inhaled air to the blood for delivery to the body cells, expel waste products returned to the lungs by the blood through exhalation, produce airflow through the larynx to make speech possible
the respiratory system is divided into:
upper respiratory tract (nose, mouth, epiglottis, larynx and trachea)
lower respiratory tract (bronchial tree and lungs)
airway
describes the upper respiratory tract and the bronchial tree
nasal septum
a wall of cartilage that divides the nose into two equal sections
cilia
the thin hairs located just inside the nostrils, filters incoming air to remove debris
mucous membranes
specialized tissue that lines the nose; also lines the digestive, reproductive, urinary systems and other parts of the respiratory system
mucus
a slippery secretion produced by the mucous membranes that protects and lubricates these tissues
olfactory receptors
nerve endings that act as the receptors for the sense of smell; also important to the sense of taste
paranasal sinuses
air-filled cavities lined with mucous membranes are located in the bones of the skill
primary functions of the sinuses(3)
to make the skull bones lighter, to help produce sound by giving resonance to the voice, to produce mucus to provide lubrication for the tissues and nasal cavity
frontal sinuses
are located in the frontal bone just above the eyebrows
sphenoid sinuses
located in the sphenoid bone behind the eye and under the pituitary gland, close to the optic nerves
maxillary sinuses
the largest of the paranasal sinuses; located in the maxillary bones under the eyes
ethmoid sinuses
located in the ethmoid bones between the nose and the eyes
pharynx
aka throat; receives the air after it passes through the nose or mouth
pharynx is made up of 3 divisions:
nasopharynx, oropharynx, laryngopharynx
nasopharynx
the first division; posterior to the nasal cavity and continues down behind the mouth; this portion is used only by the respiratory system for the transport of air and opens into the oropharynx