Mammalian cells refer to cells derived from organisms within the class Mammalia, which includes mammals like humans, mice, and rats. These cells have complex structures and functions, similar to those found in the human body, making them valuable tools for studying biological processes and diseases. Research using mammalian cells can help scientists understand fundamental biological mechanisms, develop new drugs, and create disease models for testing therapeutic interventions. Techniques for studying mammalian cells include cell culture, microscopy, molecular biology, and genetic engineering. This research area is crucial for advancing our understanding of human health and disease.