PSM V19 D482 Diagram of sea urchin
Summary
Fig. 7.—Diagram of Sea-Urchin. a, Anus; b, Stomach; c, Mouth; e, Heart, which by vascular rings encircles the alimentary canal at d and f.
Tags
blood circulation
popular science monthly illustrations volume 19
diagram
scientific illustrations
science
science history
popular science
Date
1881
Source
Wikimedia Commons
Link
Copyright info
public domain