Identify the combining form ir(o) with its closest definition.
A. Hearing
B. Eye
C. Iris
D. Tears
The correct answer and explanation is :
The correct answer is C. Iris.
Explanation:
The combining form “ir(o)” comes from the Greek word iris, which refers to the iris of the eye. The iris is the colored part of the eye, and its main function is to control the size of the pupil, thus regulating the amount of light that enters the eye.
In medical terminology, combining forms are used to create words that describe structures or functions within the body. The combining form “ir(o)” specifically refers to the iris because the iris is a critical structure within the eye that can be involved in various medical conditions. Some examples of terms that use the combining form “ir(o)” include:
- Iritis: Inflammation of the iris, which can cause redness, pain, and light sensitivity.
- Iridectomy: A surgical procedure in which part of the iris is removed, typically to treat conditions like glaucoma.
- Iridology: A controversial practice in alternative medicine that involves examining the iris of the eye to diagnose health conditions.
The choice B. Eye is close, but the combining form for the general term “eye” is typically “ophthalm(o)” (e.g., ophthalmology, which is the study of the eye and its diseases).
While A. Hearing is a possibility for many combining forms (such as “acous(t)” or “audio-“), “ir(o)” does not relate to hearing.
D. Tears would involve a different combining form, such as “dacry(o)” or “lacrim(o)” (e.g., dacryocystitis, which refers to inflammation of the tear sac).
In summary, “ir(o)” specifically refers to the iris of the eye, making C. Iris the correct answer.