1. Endocrine System Body can regulate processes using 2 different systems: 1) nervous system = through nerve impulses 2) endocrine system = through hormones

2. Endocrine System all organs that produce hormones these organs are called GLANDS glands release hormones when nervous system tells them to do it hormones are chemicals that control different activities in the body/ like ‘messengers’ effect lasts while there is hormone present each hormone acts on specific cells = TARGET CELLS Example 1: pancreas produces insulin Target: liver cells Example 2: adrenal glands produce adrenalin Target: pacemaker, liver cells, bronchi, diaphragm, pupil muscle http://www.youtube.com/watch?v=8fh2HmdxQjQ http://www.youtube.com/watch?v=1IQQPtyE7Lc&feature=related