Section: AP 2 – 131 – Fall 2010
Laboratory Report: Exercise 1: The Endocrine System
Purpose: What is the purpose of this exercise? Is there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken.
1. Identify the major endocrine glands and other organs containing endocrine cells on models and diagrams (glands listed below).
2. Identify the major endocrine glands in the cat (glands listed below).
3. Identify the histological features (listed below) of the major endocrine glands on microscope slides.
4. Identify the endocrine organ from which a slide is prepared when viewing the slide with a microscope.
With any lab or scientific experiment there is always risk involved. It is imperative for one to be observant of their surroundings while conducting the lab to ensure safety at all times. This lab requires the use of a Microscope and Glass Slides. The glass of the slides is thin and should be handled gingerly to prevent cracking or breaking, which may result in injury. Additionally, it is imperative to use the Microscope correctly to prevent breaking slides or dropping the scope.
Activity 1: The Pituitary Gland
Observations: Please describe in detail the structures and features you observed on the pituitary gland slide.
The pituitary gland was observed to be in 2 distinct parts and separated by a middle ridge (little ravine). I observed the gland to be composed of two tissue types, an adenohypophysis (anterior lobe) derived from buccal ectoderm and a neurohypophysis (posterior lobe) also called pars nervosa derived from neural ectoderm. The adenohypophysis contains mainly cords of glandular epithelium surrounded by blood vessels and some C.T. The major anterior portion of this lobe is called pars distalis. A smaller portion, pars intermedia, lies between the pars distalis and the posterior lobe neurohypophysis. The posterior lobe contains mainly