Endocytosis: A process where cells engulf large particles or whole cells by enclosing them in vesicles.
Phagocytosis: Involves the ingestion of whole cells or large particles (e.g., bacteria) by white blood cells.
Pinocytosis: Often referred to as "cell drinking," involves the uptake of fluids and dissolved substances.
Nerve Cells (Neurons): Specialized cells that transmit information throughout the body.
Can be very long, for example, some neurons are the length of an arm, allowing them to efficiently carry signals from one part of the body to another.