Lab 27. The Endocrine
System
Safety info
• Read the two sheets (green and pink)
• Sign the yellow sheet
• Under 18? Please see me.
Lab safety
•
•
•
•
First aid kit at the front
Fire extinguisher at the back
Eye wash at sink
Showers in the back
Lab Safety
• No eating or drinking in lab
• Clean up rule:
– It is your responsibility to clean up after
yourself and put everything back like you
found it
Lab clean up
• Put models back, like you found them
• Put microscopes back
• Put slides back in the proper box
Lab clean up
• Dispose of other items as follows:
– Paper towels go in the trash
– Broken glass and slide cover slips go in
“broken glass”
– Biological waste goes in red bucket
– Empty slides get rinsed, dried, and
returned to box
– Dissection tools: put in wash
– Wipe down your bench area when done
Endocrine
Organs
Pituitary Gland
Pituitary
Pituitary Control
Thyroid
Gland
Follicles:
follicular cells
surrounding
lumen filled with
thyroglobulin
T3, T4
C Cells
(parafollicular
cells): Calcitonin
Thyroid
Parathyroid Gland
Chief
cells:
Oxyphil
cells
Adrenal Glands
Adrenal Glands
• Cortex
– Zona glomerulosa: mineralcorticoids
– Zona fasciculata: glucocorticoids
– Zona reticularis: sex steroids
• Medulla: epinepherine and
norepinepherine
Pancreas
Pancreas
• Endocrine pancreas:
– Islets of Langerhans
• Alpha cells: glucagon
• Beta cells: insulin
• Exocrine pancreas:
– Acinar cells: digestive
juices, buffers
Male
Gonad:
Testis
Interstitial Cells:
Secrete
testosterone
Female
Gonad:
Ovary
Follicular cells:
secrete estrogens
As corpus luteum,
secrete estrogen
and progesterone
Today’s Lab
• Examine slides:
– Thyroid gland
– Parathyroid gland
– Pancreas
– Pituitary
– Adrenal gland
– Draw and label each tissue on paper provided
• Complete review sheet
• Due next week in lab (Thursday)