Organelles such as the oral groove
, which is the groove leading to the mouth; the cilia, tiny hair-like projections that paramecia use to facilitate movement; and food vacuoles, membrane-bound cavities that store and digest food, can all be observed.
2A) was observed in only the most oral third of the larval body where it meets the nerve nodule on the anterior end of the oral groove
. At least five pairs (left and right) of sensory neurons (eyespots) have ciliary tufts positioned aboral to the coronal nerve ring.
Even though almost 500 bacterial strains have been identified already, he believes this may be only a fraction of the bacteria living in this oral groove