Animal cells are eukaryotic cells or cells with a membrane-bound nucleus. Unlike prokaryotic cells, DNA in animal cells is housed within the nucleus. In addition to having a nucleus, animal cells also contain other membrane-bound organelles, or tiny cellular structures, that carry out specific functions necessary for normal cellular operation. Animal cells are the types of cells that make up most of the tissue cells in animals. Different kinds of animals have different numbers of cells, but most have millions and millions. Human beings, for instance, have over 40 trillion cells. Animal cells are eukaryotic, which means they have a nucleus that holds DNA. 5 days ago · cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. A single cell is often a complete organism in itself, such as a bacterium or yeast. Other cells acquire specialized functions as they mature. Animal cells are the basic structural and functional units of animal tissues and organs. They are eukaryotic cells. It means that, unlike prokaryotic cells, animal cells have membrane-bound organelles suspended in the cytoplasm enveloped by a plasma membrane. This fundamental feature is not exclusive to animal cells though. 3.1: Animal Cells. Page ID. John W. Kimball. Tufts University & Harvard. This schematic represents an idealized animal cell, e.g., a liver cell. The columns to the left and right of the labels contain links to discussions of the particular structures. Intermediate filaments. ZjSmpj.