The document discusses various laboratory animals used in pharmacological research, including zebrafish, frogs, and dogs. It provides information on housing conditions, environmental factors, anatomical features, anesthesia, euthanasia, blood collection techniques, drug administration routes, and uses of frogs in research. Common frog species mentioned are Xenopus laevis, Xenopus tropicalis, and Rana tigrina. Procedures described include blood collection from the lingual venous plexus, ventral abdominal vein, and femoral vein/heart of frogs using fine needles.