Final answer:
In the anatomy of the eye, the combining form for the middle, highly vascular layer is 'uve/o-', making the correct answer option (b) uve/o. This layer of the eye includes the choroid, ciliary body, and iris.
Step-by-step explanation:
The anatomy of the human eye is complex, consisting of several layers that function together to enable vision. The vascular tunic is the middle, highly vascular layer of the eye, largely comprised of the choroid, ciliary body, and iris. When referring to medical terminology and combining forms, the term 'uve/o-' is used to indicate the vascular layer of the eye. Thus, for the question regarding the combining form for the middle, highly vascular layer of the eye, the correct option is (b) uve/o.
The choroid portion of the vascular tunic is a layer of highly vascularized connective tissue supplying blood to the eyeball. The ciliary body is a structure of smooth muscle connected to the lens that aids in focusing light onto the retina. The iris is the colored part of the eye that regulates the amount of light entering through the pupil. The fibrous tunic and the neural tunic, or retina, comprise the outer and innermost layers of the eye, respectively. The retina is responsible for photoreception, converting light into neural signals for the brain to interpret as images.