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 T 3, T 4 C Cells (parafollicular cells): Calcitonin

Thyroid

Parathyroid Gland Chief cells: Oxyphil cells

Adrenal Glands

Cortex –Zona glomerulosa: mineralcorticoids –Zona fasciculata: glucocorticoids –Zona reticularis: sex steroids Medulla: epinepherine and norepinepherine

Pancreas

Endocrine pancreas: –Islets of Langerhans Alpha cells: glucagon Beta cells: insulin Exocrine pancreas: –Acinar cells: digestive juices, buffers

Interstitial Cells: Secrete testosterone Male Gonad: Testis

Follicular cells: secrete estrogens As corpus luteum, secrete estrogen and progesterone Female Gonad: Ovary

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)