14 in stock
Nereis, Parapodium. Wet mount.
Structure used for respiration and locomotion, depending on the species.
C.s. in region of esophagus, selected to show hearts.
Cross section of older twig showing annual twigs and resin ducts. Pine has an endarch siponostele. B...
Horsefly, Mouth Parts - Piercing and sucking mouth parts.
Dioecious, Section of female conceptacle with megasporangia. Botany Slide – Fucus Vesiculosus (Fem...