Curated OER
Integumentary System
In this integumentary system worksheet, 9th graders list the two major layers of the skin and name the type of tissue composing each layer. Then they describe the structure and function of the hypodermis. Students also list three types...
Estrella Mountain Community College
Estrella Mountain Community College: Phylum Annelida
This section (in table of contents as "Phylum Annelida: Segmented Worms") gives a description of how segmented worms developed certain characteristics as well as it explains the differences in the evolution of different classes of...