The cell wall and chlorophyll are absent in animal cells. These are unique to plant cells.
The large intestine's main function is to process waste.
Active transport requires energy from the cell. It occurs when substances move from areas of lower to higher concentration or when very large molecules are transported. Types of active transport include ion pumps, such as the sodium-potassium pump, and vesicle transport, which includes endocytosis and exocytosis.
