Examlex
Circulatory systems in molluscs
Serosa
The outermost layer of tissue that envelops some internal organs, part of the lining of the body cavities and a structure involved in protection and secretion.
Submucosa
A layer of tissue beneath the mucosa, containing blood vessels, nerves, and lymphatics, supporting the mucosa.
Plicae Circularis
Plicae circulares are circular folds of the inner lining of the intestine, which increase the surface area for absorption of nutrients.
Intestinal Villi
Small, finger-like projections that extend into the lumen of the small intestine, greatly increasing its surface area for nutrient absorption.
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