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15 cards from this deck
Sends hormones (chemical messengers) around body
Chemical messengers
Directly into the bloodstream
Master gland
Insulin
Controls blood glucose levels
Thyroxine
Controls metabolic rate, heart rate & temperature
Adrenaline
'Fight or flight' response to stress
Oestrogen
Menstrual cycle & female secondary sexual characteristics
Testosterone
Sperm production & male secondary sexual characteristics
Much slower but acts for longer
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