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A pseudopod or pseudopodium (pl.: pseudopods or pseudopodia) is a temporary arm-like projection of a eukaryotic cell membrane that is emerged in the direction of movement. Filled with cytoplasm , pseudopodia primarily consist of actin filaments and may also contain microtubules and intermediate filaments .
Amoeboid movement is the most typical mode of locomotion in adherent eukaryotic cells. [1] It is a crawling-like type of movement accomplished by protrusion of cytoplasm of the cell involving the formation of pseudopodia ("false-feet") and posterior uropods.
The axial projection is a very long pseudopodium that extend out of the basal aperture and is surrounded by shorter terminal projections which form a terminal cone around the axial projection. The feeding in segmented Nassellarians is done in three phases: 1) extension, 2) capture, and 3) retraction. [ 5 ]
Actinosphaerium eichhornii illustration. n: nucleus, a: axopodium.Note the higher density of vacuoles in the peripheric ectoplasm.. Actinosphaerium species belong to an informal group known as heliozoa, which are unicellular eukaryotes (or protists) that are heterotrophic (also known as protozoa) and present slender, radiating, specialized pseudopodia known as axopodia. [1]
Trichosphaerium is a genus of amoebae characterized from other Amoebozoa by a multiporous test and a specialized non-motile pseudopodium, known as a dactylopodium, shaped like a digit. The dactylopodium is considered a sensory structure.
After Acrasis spores are released, they germinate into free living limax amoebae, where they use a single pseudopodium to move forward, reaching to become up to 32 micrometers long. [3] During this stage they may experience conditions of starvation or dehydration where they differentiate into a microcyst that has an extracellular cell wall. [5]
The remains of the destroyed protoplast still within the algal cell are then engulfed by an ingestion pseudopodium. Vampyrella lateritia can consume several algal cells before entering the digestive cyst phase. After absorbing a single algal cell, Vampyrella lateritia is about ten times its original volume. [12]
A pseudopodium or "false foot" is a temporary obtrusion from the body of the amoeba that helps pull it along surfaces for movement or helps to pull in food. The amoeba does not have permanent appendages and the pseudopodium is more of a slime-like consistency than a flagellum.