Answer:
1. The primary purpose of all epithelial tissue is to cover the different body surfaces, this includes cavities that are not in contact with the exterior and parts of the body that are in contact with the exterior.
2. Tongue and esophagus.
3. The images with the types of epithelium are attached.
Explanation:
The main purpose of epithelial tissue is to cover all the surfaces of our body. These are the cavities, and the parts that are in contact with the exterior. They create barriers that protect the body, secrete, absorb substances, allow the passage of specific elements, and stop the entrance of others. The functions vary according to where the tissue is in the body.
The tongue, as it is in contact with the exterior and with the food that enters our mouth, it has a stratified squamous epithelium. The thickness of this epithelium protects it against the different things that can damage or enter through it.
The esophagus has a nonkeratinized stratified squamous epithelium that protects the esophagus from the damage, that food or antigens may cause.
Squamous epitheliums have cells with a not specific shape that has their nucleus in the center.
Cuboidal epithelial have lined cells with a cuboidal shape.
Columnar epithelial have lined cells with a rectangular shape, and their nucleus is near the basal region.
