The choriocapillaris contains which type of capillaries?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

The choriocapillaris contains which type of capillaries?

Explanation:
The choriocapillaris is built for rapid exchange with the outer retina. Its capillaries are fenestrated, meaning they have small pores in the endothelium that allow plasma components to diffuse easily into the surrounding tissue. This high permeability is essential to deliver oxygen and nutrients to the photoreceptors and to remove waste, matching the outer retina’s high metabolic demand. Continuous capillaries, non-fenestrated, would restrict diffusion and aren’t suited for this role, and sinusoidal capillaries have very irregular gaps and are typical of organs like liver or bone marrow. So the fenestrated type best fits the function of the choriocapillaris.

The choriocapillaris is built for rapid exchange with the outer retina. Its capillaries are fenestrated, meaning they have small pores in the endothelium that allow plasma components to diffuse easily into the surrounding tissue. This high permeability is essential to deliver oxygen and nutrients to the photoreceptors and to remove waste, matching the outer retina’s high metabolic demand. Continuous capillaries, non-fenestrated, would restrict diffusion and aren’t suited for this role, and sinusoidal capillaries have very irregular gaps and are typical of organs like liver or bone marrow. So the fenestrated type best fits the function of the choriocapillaris.

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