Centriole
Centriole: barrel-shaped organelle from which microtubules lengthen
Cilium
Cilium: plural, cilia. short hairlike extensions that project from the plasma membrane of some eukaryotic cells.
Cytoskeleton
Cytoskeleton: network of protein filaments that support, organize and move eukaryotic cells and their internal structures.
Intermediate filament
Intermediate filament: stable cytoskeletal element of animals and some protists; different types are assembled from different fibrous proteins
Microfilament
Microfilament: reinforcing cytoskeletal element involved in cell movement; fiber of actin subunits
Microtubule
Microtubule: cytoskeletal element that can form a dynamic scaffolding for many cellular processes involved in movement. Hollow filament of tubulin subunits .
Motor protein
Motor protein: type of energy-using protein that interacts with cytoskeletal elements to move the cell’s parts or the whole cell
Pseudopod
Pseudopod: a temporary protrusion that helps some eukaryotic cells move and engulf prey
Cell Junction
Cell Junction: structure that connects a cell to another cell or to ECM (extracellular matrix)
Adhering junction
Adhering junction: cell junction that fastens an animal cell to another cell, or to basement membranes. Connects to cytoskeletal elements inside the cell; composed of adhesion proteins.
Gap junction
Gap junction: cell junction that forms a closable channel across the plasma membranes of adjoining animal cells
Tight junction
Tight junction: cell junction that fastens together the plasma membrane of adjacent animal cells. Collectively present fluids from leaking between cells.
Basement membrane
Basement membrane: extracellular matrix that structurally supports and organizes animal tissues
Extracellular matrix (ECM
Extracellular matrix (ECM): complex mixture of substances secreted by a cell onto its surface; composition and function vary by cell type
Lignin
Lignin: material that strengthens cell walls of some plants
Primary wall
Primary wall: the first cell wall of young plant cells
Secondary wall
Secondary wall: lignin-reinforced wall that forms inside the primary wall of a plant cell
