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Ch. 7.7 Special Senses Key Terms
Ch. 7.7 Special Senses Key Terms
Ch. 7.7 Special Senses Key Terms
Ch. 7.7 Special Senses Key Terms
Ch. 7.7 Special Senses Key Terms
100

AQUEOUS HUMOR

A clear, watery fluid that fills the SPACE BETWEEN THE CORNEA AND THE IRIS.

100

CONJUNCTIVA

  1. A membrane that LINES THE EYELIDS AND COVERS THE FRONT OF THE EYE to provide additional protection and lubrication.

100

LENS

A CIRCULAR STRUCTURE LOCATED BEHIND THE PUPIL and suspended in position by ligaments.

100

REFRACTS

  1. BENDS light rays. (The aqueous humor and lens refract light rays).

100

VESTIBULE

 The FIRST SECTION OF THE INNER EAR, located between the cochlea and the semicircular canals.

200

AUDITORY CANAL

  1.  Also called the EXTERNAL AUDITORY MEATUS, it is a CANAL THAT PROTECTS THE EAR

200

CORNEA

  1. A CIRCULAR, TRANSPARENT PART OF THE FRONT OF THE SCLERA. It allows light rays to enter the eye.

200

ORGAN OF CORTI

  1. The RECEPTOR OF SOUND WAVES within the cochlea. It transmits the impulses from sound waves to the auditory nerve.

200

RETINA

  1. The INNERMOST LAYER OF THE EYE that contains nerve cells and photoreceptors (rods and cones), which pick up light rays (image) and transmit them to the optic nerve.

200

VITREOUS HUMOR

  1. The JELLYLIKE SUBSTANCE that fills the area behind the lens. It helps maintain the shape of the eyeball and also refracts light rays.

300

AURICLE

  1.  Another name for the PINNA (the visible part of the ear).

300

EUSTACHIAN TUBE

  1.  A canal that CONNECTS THE MIDDLE EAR TO THE PHARYNX (THROAT). It allows air pressure on both sides of the tympanic membrane to be equalized.

300

OSSICLES

The three small bones in the middle ear: the MALLEUS (hammer), INCUS (anvil), and STAPES (stirrup).

300

SCLERA

The OUTERMOST LAYER OF THE EYE, often referred to as the "WHITE" OF THE EYE.

400

CHOROID COAT

The middle layer of the eye, which is a DELICATE MEMBRANE

400

IRIS

The COLORED PORTION OF THE EYE, located behind the cornea on the front of the choroid coat.

400

PINNA

  1. The VISIBLE PART OF THE EXTERNAL EAR, composed of elastic cartilage. It directs sound waves into the auditory canal.

400

SEMICIRCULAR CANALS

  1. Three small, delicate tubes in the inner ear that contain FLUID AND HAIRLIKE CELLS to help maintain BALANCE AND EQUILIBRIUM.

500

COCHLEA

  1. Shaped like a SNAIL SHELL, it contains the delicate, hairlike ORGAN OF CORTI and transmits the impulses from sound waves to the auditory nerve.

500

LACRIMAL GLANDS

  1. Glands that PRODUCE TEARS which constantly moisten and cleanse the eye.

500

PUPIL

  1. The OPENING IN THE CENTER OF THE IRIS which regulates the amount of light that enters the eye.

500

TYMPANIC MEMBRANE:

  1. Also known as the EARDRUM, it separates the external ear from the middle ear and VIBRATES WHEN SOUND WAVES HIT IT to transmit the waves to the middle ear.