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. 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
axon

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

9. The nervous system works quickly, using electrical signals.
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)
spinal chord
nerves

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