Question

What kind of tissues send messages from the brain to the rest of the body?

Answer 1

Hint: Tissue is a set of cells with identical structures that work together as a unit. The intercellular matrix, a non-living substance, fills the gaps between the cells. This could be plentiful in some tissues while being scarce in others.
Complete answer:
The term "nervous tissue" refers to groups of coordinated cells in the nervous system, which is the organ system that regulates the body's movements, sends and receives signals from various parts of the body, and controls bodily functions including digestion, respiration, etc. Neurons and neuroglia are the two primary types of nervous tissue. Neuroglia, unlike neurons, does not transmit electrical impulses; however, neuroglia perform a variety of other roles, including assisting and defending neurons. The nervous system is divided into many subsystems. The brain and spinal cord make up the central nervous system (CNS), which coordinates input from various parts of the body and sends nerve impulses that regulate all bodily movements. Peripheral nerves branch across the body, making up the peripheral nervous system (PNS). It connects the CNS to the rest of the body and is directly responsible for regulating particular body movements; for example, just before leg movement, the CNS sends nerve impulses to the PNS nerves in the leg, causing the leg to move. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PSNS) are two more divisions of the nervous system. When an organism meets a threat and must determine whether to fight or run away, the SNS activates to elicit a fight-or-flight response in that organism. The SNS nerves have a variety of effects on various parts of the body. When the SNS is activated, it dilates the pupils of the eyes, prevents digestion, increases sweat secretion, and raises the heart rate. The PSNS, on the other hand, is triggered during “rest and digest” periods, when an organism is not under attack. PSNS nerves activate processes that may happen at rest, such as digestion, waste excretion and it also decreases the heart rate.

Note:
The gastrointestinal tract is regulated by the enteric nervous system (ENS) (digestive tract). The autonomic nervous system is made up of this division of the nervous system, as well as the SNS and PSNS. The ANS controls unconsciously performed activities; for example, digestion.