Choose the wrong statement.

State whether the following statement is true or false:
The brain,spinal cord,and nerves are all composed of muscular tissue.

Name the muscular tissue whose cells are spindle-shaped and uninucleate.

Write true $(T)$ or false $(F)$ for the following statements:
$(a)$ Epithelial tissue is a protective tissue in the animal body.
$(b)$ The lining of blood vessels,lung alveoli,and kidney tubules are all made up of epithelial tissue.
$(c)$ Epithelial cells have a lot of intercellular spaces.
$(d)$ The epithelial layer is a permeable layer.
$(e)$ The epithelial layer does not allow the regulation of materials between the body and the external environment.

Which of the following cells is found in the cartilaginous tissue of the body?

Name the animal tissue which acts as a heat insulator.