An important fact about animal cells is that they are eukaryotic cells. Although plant and animal cells are both eukaryotic, animal cells have different organelles and are smaller than plant cells. An organism can be composed of up to trillions of animal cells, with hundreds of different types and functions.
Animal cells are eukaryotic cells, which are cells with a nucleus and organelles inside of cell membranes. A nucleus contains the DNA material for eukaryotic cells. Organelles are structures within a cell that carries out specific functions, such as providing energy, producing hormones or creating enzymes.
Plant and animal cells are both eukaryotic cells, but they have significant differences in their structures. An animal cell is generally smaller than a plant cell. As opposed to a plant cell, an animal cell varies in size is irregular in shape. An animal cell does not have a large vacuole or cell wall, but it has organelles such as centrioles, lysosomes, cilia and flagella.
Trillions of animal cells make up an organism. Cells differ in shapes and size based on their specific functions. There are hundreds of different types of animal cells within the human body, each responsible for a different biological function.