The Endocrine System - English Microscope Slides are microscope slides from 3B Scientific and manufactured in Germany. 6 Microscope Slides.1(f). Pituitary gland (hypophysis), human, t.s.2(f). Pineal gland (epiphysis), sheep, l.s.3(d). Thyroid gland, sheep, t.s.4(d). Pancreas with islets of Langerhans, cat, t.s.5(d). Adrenal gland, cat, t.s.6(d). Corpus luteum in ovary of pig, t.s. The slides are best used for student education on the endocrine system.