exam 3: respiratory and digestive system

what consists of the upper respiratory system?

nose, pharynx, and associated structures

what consists of the lower respiratory system?

larynx, trachea, bronchi, and lungs

what does the conducting zone do? what structures achieve this?

• conducts air to lungs

• nose, pharynx, larynx, trachea, bronchi, bronchioles and

  terminal bronchioles

what does the respiratory zone do? what structures achieve this?

• main site of gas exchange

• respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli

Structures of the Respiratory System image

what can be found beuond the nasal vestibule?

• the internal nose (the large cavity)

• internal nares or choanae

• ducts from paranasal sinuses and nasolacrimal ducts opening into internal nose

• olfactory receptors in olfactory epithelium

what divides the nasal cavity?

the nasal septum

function of the nasal conchae?

• subdivide cavity into meatuses

• increases surface area and prevents dehydration

what is deglutition? what assists it?

• the act of swallowing

• contraction of skeletal muscles assists in deglutition

where does the pharynx start?

starts at internal nares and extends to cricoid cartilage of larynx

functions of the pharynx

• passageway for air and food

• resonating chamber (aid in producing voice)

• houses tonsils

what are the three anatomical regions of the pharynx?

• nasopharynx

• oropharynx

• laryngopharynx