Anatomy & Physiology Flashcards
Sphenoid bone
Unpaired bone at the base of the skull that along with the temporal bones provide bony attachments for the velopharyngeal musculature
Nasal bridge
The bony structure that is located between the eyes and corresponds with the nasofrontal suture
Columella
The structure at the anterior end of the nasal septum that supports the nasal tip and is between the nostrils
Nares
Nostrils
Nasal sill
Base of nostril opening
Alae
Two curved sides of the nostril
Philtrum
The dimple that courses from the columella down to the upper lip and bordered by the philtral ridges
Vermillion
Red portion of the lip
Canthus
Corner of the eye, medial and lateral
Palbebral fissure
The anatomic name for the separation between the upper and lower eyelids
Nasal Septum
Separates the nasal cavity into two halves made up of the:
Quadrangular septal cartilage
Vomer bone
Perpendicular plate of ethmoid
Quadrangular septal cartilage
anterior portion of nasal septum and projects anteriorly to the columella
Vomer bone
Perpendicular to the palate, fitting into a groove formed by the median palatine suture line on the nasal side of the maxilla
Perpendicular plate of ethmoid
Projects downward to join the vomer
Nasal turbinates (nasal conchae/singular concha)
Paired bony structures curled to create turbulent airflow. The superior (upper) and middle turbinates are part of the ethmoid bone. The inferior (lower) turbinates are the largest and an entirely separate bone.
Function= filter air, warm air and project air upward to enhance the sense of smell
Nasal meatuses (singular meatus)
Superior, middle, inferior directly under each turbinate. Openings through which air passes through nasal cavity.
Four pairs of paranasal sinuses
Frontal, maxillary, ethmoid and sphenoid connected to the nose by a small opening called the ostium.
Parts of external ear
Pinna and external auditory canal
Pinna
Delicate cartilaginous framework of the external ear. Functions to direct sound energy into the auditory canal
Mastoid cavity
A section of the temporal bone that is porous and located just behind the ear.
Parts of Middle Ear
Housed within temporal bone Mastoid cavity Tympanic membrane Ossicles Eustachian tube
Tympanic membrane
Thin tissue that separates the outer ear from the middle ear.
Transmits sound energy through the ossicles.
Ossicles
Malleus, Incus, stapes
Malleus
Attached to Tympanic membrane
Incus
Attached to both malleus and stapes
Stapes
piston to create pressure waves within the fluid filled cochlea of the inner ear
Eustachian Tube
Connects the middle ear to the nasopharynx
It opens and closes to provide ventilation for the middle ear and mastoid cavities and also equalizes air pressure between the middle ear and the environment
Inner Ear
Cochlea
Organ of Corti
Semicircular Canals
Cochlea
Bony spiral tube that houses the Organ of Corti
Organ of Corti
where mechanical energy is converted to electrical stimulation which is then conducted by the auditory nerves to the auditory cortex, culminating in the awareness of sound.
Inner and outer hair cells of the cochlea may be damaged by a variety of ways, leading to sensorineural hearing loss.
Semicircular canals
Help with balance
Obicularis oris
sphincter muscle around the mouth, forming much of the tissue of the lips.
It has extensive connections to muscles that converge on the mouth.
This muscle acts to shape and control the size of the mouth opening and is important for creating the lip positions and movements during speech and eating.
Buccinator
facial muscle of cheek; plays an important role in mastication, working with tongue and orbicularis oris muscle to keep food between teeth; when it is paralyzed food accumulates in the oral vestibule.
Masseter
runs from the temporal bone (that forms part of the sides and base of the skull) to the lower jaw (the mandible).
It lifts the lower jaw, to close the mouth.
The masseter is the strongest muscle in your body.