Answer:
The correct option is b. Contain ground substance.
Step-by-step explanation:
In every part of the body, epithelial cells, a type of tissue, line the surfaces of the organs, cavities, and structures. They distinguish themselves from other cell types thanks to a number of distinctive traits.
a. Cells are polarised, which is one of the distinguishing characteristics of epithelial cells. This indicates that the apical (top) and basal (bottom) surfaces of these organisms differ significantly in terms of structure and functionality. While the basal surface is affixed to underlying connective tissue, the apical surface is exposed to the outside world or a bodily cavity. Because of their polarity, epithelial cells can carry out specialised tasks as absorption, secretion, and defence.
b. Ground substance does not exist in epithelial cells. The term "ground substance" describes the gel-like substance that fills the spaces between cells and fibres in connective tissue. The primary function of epithelial cells is to build barriers and line surfaces; they are not directly engaged in creating or preserving ground substance.
c. Epithelial tissues are avascular, meaning they do not contain blood vessels. Instead, they get their nutrition and oxygen by diffusing it through the underlying connective tissue from blood vessels close by. Due to this property, epithelial cells may efficiently exchange materials with surrounding tissues while still performing their barrier role.
d. When injured or lost as a result of an injury or regular turnover, epithelial cells have an amazing capacity to regenerate and repair themselves. This ability to regenerate is essential for preserving the structure and functionality of epithelial tissues throughout the body. The quick replacement of damaged or old cells due to the high turnover of epithelial cells enables effective healing and the preservation of tissue homeostasis.