1. Phagocytosis: This is the process of engulfing large particles, such as bacteria or cell debris, into the cell. The cell membrane surrounds the particle and forms a vesicle called a phagosome. The phagosome then fuses with a lysosome, which contains digestive enzymes that break down the particle.

2. Pinocytosis: This is the process of taking in small molecules and fluids from the surrounding environment. The cell membrane invaginates and forms a small vesicle called a pinosome. This vesicle then transports the ingested molecules into the cell.

Here's a simple analogy:

* Phagocytosis is like a cell "eating" a big bite of food with its mouth.

* Pinocytosis is like a cell "drinking" a small sip of water through a straw.