I think the answer you're looking for here is nervous tissue which carries action potentials, or nervous impulses, between the tissues and are central nervous system. However, from another point of view you could also consider the cardiovascular system as carrying hormonal messages throughout the body.
Nerve tissues carry messages throughout our bodies. Nerves are responsible for transmitting electrical impulses to and from the brain, allowing us to feel sensations, move our muscles, and regulate bodily functions.
chasquis
Allows for sensing, response ,and control
Neuron carries messages from different parts of the body.
Nerves carry messages to the muscles to react. Nerves help us feel pain, heat, and cold.
Water can dissolve most charged ions and carry them throughout our body and plant's "bodies". It can carry hormones, sugars (glucose), ect.
Yes They have been used to Carry messages for hundreds of years.
Neurons
In the back
there are different types of cells that carry messages
Hyenas carry their bodies their entire lifetime.
Our body is made up of tissues and tissues are actually a group of cells. Cells carry out the metabolic process such as synthesis of molecules, transport, secretion and digestion and so on. A particular group of tissue or cells destined to carry out a distinct function. For example blood tissue are involved in oxygen transport and immunity.