The body system that gathers and interprets information about the body's internal environments and responds to that information.

• Endocrine system

• Nervous system

• Muscular system

• Digestive system

Is a network of tissues and organs that that release chemicals hat control certain body functions.

• Endocrine system

• Nervous system

• Muscular system

• Digestive system

Electrical messages:

• hormones

• epinephrine rush

• nerve impulses

• fight or flight response

Largest part of your brain.

• Cerebrum

• Cerebellum

• Brainstem

Part of your brain connected to the spinal cord.

• Cerebrum

• Cerebellum

• Brainstem

Second largest part of your brain.

• Cerebrum

• Cerebellum

• Brainstem

The mass of nervous tissue that is located inside your skull.

• Nerve

• Brain

• Gland

• Muscle

A tissue or group of tissues that makes and releases chemicals.

• Nerve

• Brain

• Gland

• Muscle

A bundle of cells that conducts electrical signals through the body.

• Nerve

• Brain

• Gland

• Spinal cord

A bundle of nervous tissue that is about a foot and a half long and is surrounded by your backbone.

• Nerve

• Brain

• Gland

• Spinal cord