A fun, fast, portable way to review histology and cell biology 248 Q&A cards great for board review, course work, and the USMLE LANGE Flash Cards Histology and Cell Biology Review Flash Cards are a quick, concise, and effective way to review the essential concepts and methods of cell biology. Each of the 248 cards feature a high-yield study question that directs you to material that most often appears on exams. Answers appear on the flip side of the card. Flash cards are the perfect way for you to quickly identify gaps in your knowledge, allowing you to concentrate your study on your weakest areas.