AP BIOLOGY

Detailed explanation-1: -The excretory organ of the ventral gland type is especially found in free-living forms, so marine nematodes usually have a simple sacciform excretory cell with its neck open towards the excretory pore.

Detailed explanation-2: -Excretory System Regulation of water and salt content of the body is achieved by renette glands, present under the pharynx in marine nematodes.

Detailed explanation-3: -Nematodes are aquatic organisms, inhabiting marine and fresh waters and the water films of soil environments. Like most aquatic organisms, they continually excrete ammonia into the environment as it is produced, thus avoiding the toxic storage problem.

Detailed explanation-4: -Nematodes have a unique excretory system consisting, in simpler species, of one or two one-celled glands called renette cells and, in more highly specialized forms, of longitudinal excretory ducts.