crayfish

rculatory system, role of the heart, and hemolymph flow. Respiratory System: Gills and how they facilitate breathing in aquatic environments. Nervous System: Brain, nerve cords, and sensory organs. Excretory System: Green glands and their function in waste removal

ided into three main parts: The cephalothorax (head and thorax fused together) The abdomen The tail fan This segmentation supports various vital functions such as movement, feeding, respiration, and reproduction. Their external shells, called carapaces, provide protection and support, while int