Rhabdomeres have tiny microvilli ( tiny tubes extending out of the retinula ) that interlock with neighboring retinular cells.
2.
Behind each lens of a typical, functional stemma, lies a single cluster of photoreceptor cells, termed a retinula.
3.
The retinula ( literally, " small retina " ) cells of the ommatidium of the compound eye contain areas from which membranous organelles of conceivable size ( rhabdomeres ) extend.