Hormones and senses

Hormones are susbstances that help nervous system to control our body functions. Hormones travel through the bloodstream, they reach all the tissues but each one acts only on specific cells.
You can find more on hormones and endocrine system here:
Sensory receptors are responsible for detecting changes in the world around us. They can be just nerves   in muscles or skin, specilized cells in eyes, or ears, these are our senses.
You can find more about our senses here: Eye anatomy , How the eye works1, 2 , How we hear,  and receptors and effectors  eye and optical illusions (colorblindness test "test daltonismo") .  Try on this  Sense challenge! .
Those who are swapping your class have to read and do exercises pp 114 up to 103 and page 110 1 to 6 exercises. Enjoy it!.
We are not going to study skeletal and muscles, we will jump into the reproductive system.
What is synesthesia?
Some quizzes to practice:  QLD Teachers,  Proprofs,      to review vocabulary,  Interactive Biology ,  Softschools.com ,  CCSF ,