Which type of rough tissue is composed mainly of closely packed cells connected by intercellular junctions?

The correct choice is epithelia, which is characterized by closely packed cells that form continuous sheets. These cells are tightly joined together through numerous intercellular junctions, which include tight junctions, desmosomes, and gap junctions. These connections provide structural integrity and facilitate communication between the cells. Epithelial tissue serves various essential functions, including protection, absorption, secretion, and sensation due to its organized structure.

In contrast, connective tissue primarily serves to support, bind, and protect other tissues and organs. It typically contains a significant amount of extracellular matrix, comprising fibers and ground substance, which allows for a wide range of structures and functions, such as supporting structures or storing energy.

Muscle tissue is specialized for contraction and movement and consists of elongated muscle fibers that are not as densely packed as epithelial cells. Each muscle type (skeletal, cardiac, and smooth) has unique characteristics, but they do not exhibit the same intercellular junctions seen in epithelial tissue.

Nervous tissue is made up of neurons and glial cells, which are involved in signal transmission and supporting functions, respectively. While neurons can be interconnected, the overall structure does not emphasize tightly packed cells in the same manner as epithelial tissue.

Overall, the