The cockroach's shell is made of chitin, a complex polysacharide that is also found in the shells of crabs, and lobsters. Artificial chitin is also achieved by human. th
ey are also stupid. says people who r stupid lyk me!!!!
I think it is called an Exoskeleton.
Hull
The tough outer covering of Euglena, and Paramecium is called the Pellicle
The tough outer covering that lies just outside the cell membrane in a plant cell is called the cell wall. In plant cells, it is usually made up of cellulose, hemicellulose and pectin.
aponeurosis
This is called bark.
Exoskeleton/ Chitin
Schlera
It is a shell, as in a cockle shell or oyster shell.
Because insect wings are delicate. Most of the beetles (to which ladybirds belong) have a hard protective cover over their wings, to protect them from damage as the insect moves. This Keratin covering is tough and weatherproof.
The fibrous covering of a bone is called the periosteum.
The cell wall is the strong and tough covering that adds strength to plant cells. The cell walls are composed of cellulose.
A porpoise has tough leather like skin body covering, that protects them from some predators.