[Solved] Diffusion across which structure(s) returns excess CSF to venous circulation? A) third ventricle B) dural sinuses C) cerebral aqueduct D) arachnoid granulations E) lateral ventricle Specimen Examination: The process of analyzing a sample of bodily tissue or fluid in a laboratory to diagnose disease or other conditions. Naked Eye: The term "Naked Eye" refers to observing or looking at something without the aid of optical instruments, such as telescopes or microscopes. Malignant Neoplasm: A malignant tumor capable of invading adjacent tissues and metastasizing to distant body areas. Anatomical Site: A specific location on or within the human body defined for study, diagnosis, or treatment purposes.