Onkyo's website refers to this unit as a 7.2-channel receiver. It is clear from one of your photographs, but from no text in the review, that the height speaker terminals can be used as rear surround speaker terminals instead, for a 7.1 (or 7.2) channel setup.
In many cases, the students dissect human corpses (cadavers). Microscopic anatomy, also known as histology, is the study of cells and tissues of animals, humans and plants that are too small to been seen with the naked eye.
Physiology is the study of the function of body parts and the body as a whole. Gross (macroscopic) anatomy is the study of body parts visible to the naked eye, such as the heart or bones. Histology is the study of tissues at the microscopic level. Cytology is the study of cells at the microscopic level.