New details of the ultrastructure of the outer segments and ciliary connectives of the rods of human and macaque retinas

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Abstract
Critical examination of the fine structure of the outer segments of human rods shows that the membranes of at least some and probably most of the flattened saccules filling the outer segment are neither connected with the cell membrane nor with that of other saccules. The saccules typically possess a scalloped edge. The nine pairs of filaments in the ciliary connective become nine singlets in the base of the outer segment and lose their precise orientation before terminating somewhere in the length of the outer segment. The centriolar base in the inner segment possesses nine triplets of filaments and irregular numbers of club‐like, fibrous satellites. Rarely tubules insert in the satellite bodies and these may connect to the cell membrane.

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