Chicken, sheep, and pig hearts can be purchased here: http://scienceresourcebox.co.nz/secondary/secondary_dissection
Introduces the circulatory system and what that looks like in different animals. Use this before the heart dissection.
Print, cut out, and laminate so students can try to put the pieces of the circulatory system together.
Print and laminate for your science lab walls.
Circulatory System Worksheet
Instructions.
Instructions and great visuals. I printed off a few pages on A3 paper and made posters.
Instructions.
Video I made showing human, mammalian, and frog blood under the microscope.