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Interaction and coordination The endocrine system (Endocrine glands…
Interaction and coordination
The endocrine system
Responding to stimuli
Endocrine System
secrete hormones into the blood
target cells
Nervous System
extensive network of nerves
highly specialised cells
brain or spinal cord
electrical impulse to send messages
muscle cells
Maintaining Homeostasis
body temperature
blood pressure
nervous and hormonal systems
homeostasis
Endocrine glands
Hypothalamus
neurohormones
pituitary glands
pineal gland
melatonin
Pituitary Gland
gonadotropic hormones
sex organs
oxytocin
uterin contractions during childbirth
growth hormones
elongation of bones
Thyroid glands
thyroxin
metabolic levels
calcitonin
blood calcium
Adrenal glands
cortisol
aldosterone
adrenaline
Pancreatic islets
glucagon and insulin
blood glucose levels
Gonads
testes
testosterone
ovaries
oestrogen and progesterone
how is the endocrine system regulated?
brain manages the endorcrine system through two glands
pituitary gland
hypothalamus
self regulation
negative feedback mecanisms
incorrect levels triggers its own correction