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Classic Experimentation and Working Models for Engaging and Inspiring Students
Author(s) -
Giuliodori Mauricio,
Lujan Heidi,
DiCarlo Stephen
Publication year - 2012
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.26.1_supplement.719.2
Subject(s) - simple (philosophy) , closure (psychology) , class (philosophy) , mechanism (biology) , computer science , mathematics education , simulation , psychology , artificial intelligence , epistemology , philosophy , economics , market economy
We developed a simple working model of the semilunar valve to highlight the mechanism of semilunar valve closure as a consequence of the decelerated systolic efflux. The model is inexpensive and simple to build, all that is required is two sections of tubing {one 10 cm long, 31 mm x 25 mm, and another 5 cm long, 25 mm x 19 mm (outside and inside diameter)}, and a long balloon (approx. 2.5 cm diameter). Instructions to build the model are provided. Once the model is fully assembled, place the model under a facet and run water through one end. Reverse ends and repeat the procedure. As you will discover, water will flow through the model in only one direction. A discussion of the physiological significance of one‐way valves in the heart will naturally evolve to their importance in veins (an often under‐discussed and appreciated regulatory mechanism). Building and testing the model with the assigned readings of the pioneering work of Giulio Ceradini was rewarding for the teacher and students. The activity encouraged in‐class discussion, collaborative problem‐solving, and inquiry‐based thinking. This activity also focused student learning on how to use scientific knowledge to solve important questions.