They are called pseudopod.
Pseudopodia (as in, the cytoplasmic extensions of amoeba as they try to move?). I believe they are formed as a result of rapid actin polymerisation.
pseudopods
It is called a pseudopod
cytoplasmic extensions
Canaliculi
nervous tissue
dendrites
plasmodial slime molds.
Canaliculi is the narrow passageways that contain cytoplasmic extensions of osteocytes. Narrow passageways form through the matrix to allow for an exchange of nutrients in the bone.
Bone canaliculi are narrow canals containing cytoplasmic processes of osteocytes. They are located in the space between the lacunae of ossified bone.
dendrites
dendrites.