General. 1  Once an order has been submitted, please allow up to 72 hours for it to be processed and shipped (generally orders will ship out sooner than this). All orders are shipped from the LifeProof Distribution Center in the state of Colorado via FedEx (standard shipping) or FedEx SmartPost unless otherwise specified.
The cytoskeleton is made up of protein threads. It is responsible for holding the cell in place, maintaining cellular shape and supporting the cell membrane. Plant and animal cells contain three basic types of protein thread. Actin filaments, or microfilaments, are the thinnest type, while intermediate filaments are thicker and stronger. Microtubules are larger still with a hollow center and are essential for mechanical support.
A supporting framework in an animal that is contained inside the body. Humans and many other vertebrate animals have bony endoskeletons. Certain invertebrate animals, such as sponges, have endoskeletons made up of needle-like structures called spicules. Compare exoskeleton.ndoskeleton. n. 1. (Zoology) the internal skeleton of an animal, esp the bony or cartilaginous skeleton of vertebrates. Compare exoskeleton.