对于人类而言,视网膜由密集的光感棒体以及视椎体细胞组成。 棒体细胞在弱光条件下比椎体细胞更容易发挥作用,并且这些细胞也是在鲨鱼视网膜内发现的最常见的细胞类型。
Rods are able to function in much lower light than cones - and these were the most common cell types found in all of the sharks.
电镜观察到单核细胞内有微丝体、微棒状小体和空泡状发育期寄生物;
Under electron microscopy, microfilament bodies, microrhoptryand vacuolar parasitic organisms at developmental stage were observed in monocytes.
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