The nervous system controls thoughts, movement, and emotion.

1. KEY CONCEPT The nervous system and the endocrine system provide the means by which organ systems communicate.

2. The nervous system controls thoughts, movement, and emotion.

3. KEY CONCEPT The nervous system is composed of your BRAIN, SPINAL CORD, NERVES AND highly specialized cells called NEURONS

4. axon Neurons send out electrical signals to control the body. • A neuron has three parts. • cell body has nucleus and organelles • dendrites receive impulses • axon carries impulses This is a diagram of TWO neurons that are conncected Dendrites Cell Body

5. The endocrine system controls growth, development, and digestion.

6. KEY CONCEPT The endocrine system produces hormones that affect growth, development, and homeostasis.

7. Hormones are chemical signals that influence cell’s activities. Watch the video called “What is a Hormone” on the main tinyurl.com/maplesbio

8. HYPOTHALAMUS PITUITARY THYROID THYMUS ADRENAL GLANDS PANCREAS FEMALE GONADS :OVARIES MALE GONADS : TESTES Glands are the major organs of the endocrine systemand secrete hormones that act throughout the body. • There are many glands located throughout the body. • Hormones travel through the bloodstream to cells with matching receptors.

9. spinal chord nerves The nervous and endocrine systems have different methods and rates of communication. • The nervous system works quickly, using electrical signals. • interconnected network of cells • signals move through cells • divided into central nervous system (CNS) and peripheral nervous system (PNS)

10. receptor target cell hormone bloodstream not a target cell • only chemical signals • signals move through bloodstream • physically unconnected organs • The endocrine system works more slowly.