Pseudopodia (which translates to "false feet") are temporary cytoplasm-filled projections of the cell wall that certain eukaryotic cells use for motion or for ingesting nutrients. Most cells with this capability are referred to as amoeboids.
Pseudopodia are formed by microtubule and filament structures. The cell surface projects a membrane process called the lamellipodium, which is supported inside by filaments that form at the leading edge, turning into networks as they blend together. Cytoplasm flows into the lamelliopdium, forming the pseudopodia.
The functions of pseudopodia include locomotion and the capturing of prey. Pseudopodia are critical in sensing prey that can then be engulfed; the engulfing pseudopodia are called phagocytosis pseudopodia. A common example of this sort of amoeboid cell is the human white blood cell.
Pseudopodia don't all look like amorphous blobs; instead, they can be classified by their distinct appearances. Lobopodia are bulbous and amoebic. Filopodia are slender, sort of football shaped, and are supported largely by microfilaments. Reticulopodia are very complex and bear individual pseudopodia that form irregular nets. Axopodia are the phagocytosis type, with long thin pseudopods supported by complex microtubule arrays enveloped with cytoplasm, and they respond rapidly to physical contact.
Web Resources On Pseudopodia
Cilia, flagella, and pseudopodia
Amoebae: Protists Which Move and Feed Using Pseudopodia
Book Resources On Pseudopodia
Amoeba by Sean Morrison
Physiology of amoeba by Robert Jack Neff