GENERAL HISTOLOGY

Detailed explanation-1: -Spinal nerves of the thoracic region, T2 through T11, are not part of the plexuses but rather emerge and give rise to the intercostal nerves found between the ribs, which articulate with the vertebrae surrounding the spinal nerve.

Detailed explanation-2: -Because the lumbar and sacral plexuses are interconnected, they are sometimes referred to as the lumbosacral plexus. The spinal nerves in the chest do not join a plexus. They are the intercostal nerves, which are located between the ribs.

Detailed explanation-3: -The answer is (c); choroid plexus. The choroid plexus is a network of cells found in the central nervous system that aids in the production of cerebrospinal fluid (commonly known as CSF). The cervical, brachial, lumbar, and sacral plexuses are all networks of mixed spinal nerves.

Detailed explanation-4: -There are five spinal nerve plexuses-except in the thoracic region-as well as other forms of autonomic plexuses, many of which are a part of the enteric nervous system.

Detailed explanation-5: -The intercostal nerves are distributed chiefly to the parietes of the thorax and abdomen, and differ from the anterior divisions of the other spinal nerves, in that each pursues an independent course, i. e., there is no plexus formation.