For example, sensory neurons send information from the eyes, ears, nose, tongue, and skin to the brain. Motor neurons carry messages away from the brain to the rest of the body.

When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. The binding allows the nerve impulse to travel through the receiving neuron.

Neurons communicate with each other by sending chemical and electrical signals. Each neuron is connected with other neurons across tiny junctions called “synapses”. Impulses rush along tiny fibres, like electrical wires, from one neuron to the next.

The somatic nervous system carries messages that control body movements. It is responsible for activities that are under your control, such as waving your hand or kicking a ball.

You have 31 pairs of spinal nerves. They’re grouped by the area of the spine that they’re associated with. Spinal nerves have both sensory and motor function. That means that they can both send sensory information to the CNS as well as transmit commands from the CNS to your body’s periphery.

cerebrum

The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.

As the master control center for all functions of the body, the brain continually processes neurons so you can think, eat, sleep, run, play, dream and live a productive life. It is important to give your brain the very best attention and care so it can perform at its peak at all times.

The brain controls the organs in our body and our movements as well. The brain consists of three main parts, the cerebrum, the cerebellum, and the brain stem (Figure below)….The Brain.

Brain is called the control center of body because it controls every part of the body and transfers signals through nerve cells.

The central nervous system includes the spinal cord and the brain. The brain is the body’s main control center. The main function of the CNS is the integration and processing of sensory information.

Medulla. The lowest part of the brainstem, the medulla is the most vital part of the entire brain and contains important control centers for the heart and lungs.

nervous system

The liver is considered to be the second-largest organ in the human body.

These different body systems include the skeletal, nervous, muscular, respiratory, endocrine, immune, cardiovascular/circulatory, urinary, integumentary, reproductive, and digestive systems.

Human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.

The human body consists of a bony skeleton and muscles. The three main parts of the body are: the head, the trunk and the limbs (extremities). The head is composed of the cranial and facial parts.

Heart

The human body is a single structure but it is made up of billions of smaller structures of four major kinds: cells, tissues, organs, and systems. An organ is an organization of several different kinds of tissues so arranged that together they can perform a special function.

In plants, there are three main organs. A hollow organ is an internal organ that forms a hollow tube, or pouch such as the stomach, intestine, or bladder. In the study of anatomy, the term viscus refers to an internal organ. Viscera is the plural form….Organ (anatomy)