Key words

• Endocrine system: a major information system which tells glands to release hormones directly through the bloodstream to required organs
• Endocrine system: a major information system which tells glands to release hormones directly through the bloodstream to required organs
• Gland: an organ in the body that releases hormones
• Hormones: a chemical found in the bloodstream only affecting specific organisms. they have powerful effects, come in large quantities but are used up very quick
• Fight or flight the way we respond when we’re stressed. The body becomes physiologically aroused in readiness to fight the aggressor or flee
• Adrenaline: produces in the adrenal glands and is the body’s first response to immediate stress. has a strong effect on the cardiovascular system. The heart and lungs increase the heart rate, contracting blood vessels, dilating the air passage