Anatomy 30
Lab Exercise 18 – Endocrine System
I. Objectives
A. Identify the major endocrine glands in the body
B. List the hormones produced by the glands
C. View, draw, and label microscope slides of selected glands
II. Label the following endocrine glands on the models. List the hormones secreted by each
gland
A. Brain models
1. Hypothalamus
2. Posterior Pituitary (neurohypophysis)
3. Anterior Pituitary (adenohypophysis)
4. Pineal gland
B. Torso models
1. Thyroid gland
2. Parathyroid glands (on back of thyroid gland)
3. Thymus (not seen on models)
4. Adrenal glands
5. Pancreas
D. Reproductive models
1. Ovaries
2. Testes
III. View the following endocrine tissue slides under the microscope. Draw the tissues seen on
each slide and label the structures listed. (Note: you can see microscope views of these
organs in the histology atlas of the lab manual.)
A. Thyroid gland – follicle cells (what type of tissue are they?), colloid in follicles and
parafollicular cells. What do the follicle cells secrete? _______________ What do the
parafollicular cells secrete? _______________
B. Parathyroid gland (no slide available) – chief cells. What do the chief cells secrete?
__________________
C. Pancreas – acinar cells and islets of Langerhans. What two major cell types are found in the
pancreatic islets? _____________________What does each secrete? __________________
D. Ovary – vesicular (Graafian) follicle, ovum, antrum, corpus luteum. What do the follicle
cells produce? _______________ What does the corpus luteum produce? ______________
E. Testes – seminiferous tubules and interstitial cells. What do the seminiferous tubules
produce? _______________ What do the interstitial cells secrete? ____________________
IV. Complete the Lab 18 Review Exercises on pp. 229-230 (omit questions 10-13).
Label the endocrine structures of the brain on the midsagittal head below.
Label the endocrine glands visible on the torso model below.
Label the ovaries and testes on the female and male reproductive models below.