User:Charlotte E. Vogler/Notebook/Lab 6:, Embryology Transect 2 on 7/17/14

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Lab 6: Embryology, Transect 2 on July 17, 2014

Introduction, Purpose, and Objectives

Today’s lab explored the development of different species in their developmental stages. These species were starfish, frog, chicken, and human. Today's objectives were to learn the stages of embryonic development and compare embryonic development in different organisms.

Materials and Methods

Today we used prepared slides to observe the different developmental stages of four species. We also opened chicken eggs that had been fertilized and incubated for around 72 hours so that we could observe the embryonic development under a dissecting scope. After this, we recorded our data and observations in our lab notebooks, using our lab notebooks and textbooks as resources. Below, in Tables 1 and 2, our data can be observed.

Data and Observations

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Conclusions and Future Directions

This lab was primarily for the purpose of observing the differences and similarities in the embryonic development of different animals. Next week, we will study the external features, skeletal systems, and muscle systems of vertebrates.


1. Freeman, S. et al. (2008). Biological Science (5th ed.). Boston, MA: Pearson.

2. Bentley., Walters-Conte., & Zeller. (2014). Biology 210 Lab Manual. Washington: American University.