It is pretty simple which part are u confused by?
<span>Tight junctions, at the site of a tight junction, cells are held tightly against each other by many individual groups of tight junction proteins called claudins, each of which interacts with a partner group on the opposite cell membrane. For example, the tight junctions between the epithelial cells lining your bladder prevent urine from leaking out into the extracellular space.</span>
Answer:
Both Fish and Humans come under the phylum of vertebrata in Animal Kingdom. So both of them posses a vertebral column.
Explanation:
