Animal Cell
Structures
CYTOSKELETON
An interconnected system of
fibers, threads and lattices
extending between the nucleus
and the plasma membrane
Gives internal organization, shape
and capacity to move
Types of Cytoskeleton
Microfilament
–thinnest elements
–consists of two polypeptide
chains of actin subunits
Microtubules
–long, hollow cylinders of tubulin
subunits
Intermediate filaments
– ropelike cytoskeleton that gives
mechanical strength to cells and
tissues
CENTRIOLE
Barrel-shaped structure
Always in pairs and perpendicular
to each other
Microtubule-producing center
FLAGELLA & CILIA
projection from the cell for
locomotion
arise from the centrioles
made up of microtubules
Flagella
–tail-like or whip-like organelles
Cilia
–hair-like structures
Cell-to-cell Junctions
3 Types in Animal cells
TIGHT JUNCTIONS
* link cells together
ADHERING JUNCTIONS
* join cells that are subjected to
stretching
GAP JUNCTIONS
* provide channels between cells
EXTRACELLULAR
MATRIX
made up of cell secretions and
materials taken up from the
surroundings