Sand Dollar Dissection || Doves of Peace [EDU]

What’s inside a sand dollar? Well, it’s certainly not sand coins! Find out as you learn how to dissect a sand dollar in this video, which also covers its external and internal anatomy and physiology. In this simple dissection of a sand dollar, you’ll learn various parts of its anatomy, why sand dollars are named that way, and why sand dollars are so flat.

Sand dollars are a species of echinoderms that are often collected for their photogenic white exoskeleton. However, did you know that live sand dollars are actually purplish-grey and feel velvety because of thousands of tiny spines? In this video, you’ll learn general information about both sand dollars, which will be tied into their anatomical structures and physiological importance.

This dissection lab is for anyone who is curious about sand dollar anatomy, wants to cover sand dollar anatomy for a zoology course, missed the sand dollar dissection during biology class, or just wondered, “what’s that white disc I see on beaches?” The video will teach you how to dissect a sand dollar step by step, and review the external and internal anatomy of the sand dollar.

In this video, we’ll cover the following structures:
Aboral
Oral
Anus
Test
Epidermis
Tube feet
Spines
Food grooves
Petaloid
Mouth
Madreporite
Gonads (testes/ovaries)
Gonophores
Aristotle’s lantern
Pharynx
Esophagus
Stomach
Intestine
Siphon
Ring canal
Radial canals
Ampullae
Teeth
Pillars

If you want to learn more about sand dollar anatomy, here’s a link to a website with more detailed information, as well as diagrams:
http://lanwebs.lander.edu/faculty/rsfox/invertebrates/mellita.html

If you have any questions regarding sand dollar anatomy, dissection methodology, or general biology, feel free to leave a comment. We'll try our best to reply.

Website: https://www.oh-worm.com

Links to sources used in video:
https://www.amazon.com/Nautical-Crush-Trading-Dollar-Dollars/dp/B01LX7QB5R
https://www.govmint.com/1804-spanish-silver-dollar-vg
https://www.thoughtco.com/sand-dollar-profile-2291807
https://commons.wikimedia.org/wiki/File:Living_Sand_Dollar_inside_the_Reef.jpg
https://www.nhm.ac.uk/our-science/data/echinoid-directory/morphology/dollars/tubefeet.html3
https://www.mun.ca/biology/scarr/Symmetry.html
https://www.thoughtco.com/sand-dollar-profile-2291807
https://www.blackcormorant.net/2006/03/sand_dollar_bed.html
http://invert-embryo.blogspot.com/2010/
http://courses.washington.edu/mareco08/students_2008/geoff/reproduction.html
https://www.researchgate.net/figure/Morphology-of-Gregorys-diverticulum-in-the-scutelline-sand-dollar-species-Scaphechinus_fig1_325030289
https://southernboating.com/destinations/bahamas/emerald-bay/

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