What muscle does not depend on the nervous system?

What does not have a nervous system?

Nervous systems are found in almost all multicellular animals, but vary greatly in complexity. The only multicellular animals that have no nervous system at all are sponges and microscopic bloblike organisms called placozoans and mesozoans.

Are muscles connected to the nervous system?

Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle. The nervous system regulates the speed at which food moves through the digestive tract.

How does nervous system affect behavior?

Your nervous system guides almost everything you do, think, say or feel. It controls complicated processes like movement, thought and memory. It also plays an essential role in the things your body does without thinking, such as breathing, blushing and blinking.

Which branch of the nervous system calms a person?

The autonomic nervous system is made of two components, which work in opposition to one another: the sympathetic nervous system, responsible for the body’s “fight-or-flight” response to danger, and the parasympathetic nervous system, which calms the body back down.

How does the nervous system help the muscular system?

Your nervous system (brain and nerves) sends a message to activate your skeletal (voluntary) muscles. Your muscle fibers contract (tense up) in response to the message. When the muscle activates or bunches up, it pulls on the tendon. Tendons attach muscles to bones.

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How does the nervous system affect the muscular system?

Muscular System: The brain uses the nerves to tell the muscles when to move. The nerves also deliver information on what to do in a fight or flight case. Respiratory System: The brain sends pulses through the nerves to the lungs which tell them to move to collect and release oxygen and carbon dioxide.

What are the two main systems that work together as part of your nervous system?

The nervous system has two main parts:

  • The central nervous system is made up of the brain and spinal cord.
  • The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

Why do sponges not have a nervous system?

Sponges are the only multicellular animals without a nervous system. They do not have any nerve cells or sensory cells. However, touch or pressure to the outside of a sponge will cause a local contraction of its body.