Endocrine system Flashcards
what is the endocrine system?
group of specialized glands that affect the growth, development, sexual activities and health of the entire body
what does the endocrine system produce?
hormones
hormones
chemical messengers that communicate instructions to the cells of the body
hypothalamus
structure in the brain that controls the secretion of hormones
name the organs of the endocrine system (7)
- pituitary gland
- thyroid gland
- parathyroid gland
- adrenal glands
- pancreas
- ovaries
- testes
pituitary gland
-master gland of the endocrine system, located at the base of the brain
-secretes hormones that govern hormonal secretion of other endocrine glands
-produces growth hormone, prolactin
oxytocin, & antidiuretic hormone
thyroid gland
- located in the anterior neck in 2 lobes that lie on either side of the trachea (throat)
- produces thyroid hormones that regulate metabolic activity in the body & calcitonin
adrenal glands
-attached to the upper portion of each kidney
- secrete 3 types of steroid hormones called corticosteroids:
a) sex hormones i.e., estrogen and androgen
b) mineralocorticoids
c) glucocorticoids (cortisol)
-produces epinephrine (adrenaline) and norepinephrine
pancreas
-posterior to stomach and beneath the liver, plays an important role in digestion and blood sugar regulation
- exocrine function: produce digestive secretions which flow into the small intestine to help digest food
- endocrine function: produces glucagon and insulin
ovaries
- 2 oval glands in the pelvic cavity on either side of the uterus
- produce female sex cell (ovum/egg), estrogen and progesterone
testes
- 2 oval glands in the scrotum
- produce male sex cell (spermatozoa/sperm) and testosterone
growth hormone
- produced by the pituitary gland
- stimulates the growth of bones, muscles, organs and other tissue
prolactin
- produced by the pituitary gland
- enhances growth of breast tissue and stimulates milk production
oxytocin
- produced by the pituitary gland
- triggers contraction of the uterus in labour and childbirth
antidiuretic hormone
- produced by the pituitary gland
- regulates water balance in the body
calcitonin
- produced by the thyroid gland
- regulates the amount calcium in the blood and maintains healthy bones
parathyroid glands
- 4 glands attached to the thyroid
- secrete parathyroid hormone which helps maintain calcium levels in the body