A, ACID, ADJACENT, ADRENAL, ARRAY, CELL, CELLULAR, D, DEOXYRIBONUCLEIC, DNA, DON, E, ELECTRON, ENDOCRINE, ENDOPLASMIC, FAWCETT, FROM, HIGHLY, HISTOLOGICAL, HISTOLOGY, IMAGING, MEDICAL, MICROGRAPH, MICROGRAPHY, MICROSCOPY, MITOCHONDRIA, MITOCHONDRIAL, MITOCHONDRION, OF, ORDERED, RETICULUM, SCIENCE, SNAKE, SYSTEM, TEM, TO, TRANSMISSION,