Hydra is an invertebrate, which lack specialized organs. So excretory organ in not present in them rather it is through general body surface by the process of diffusion.
Excretory and reproductive
Frogs have 9 organ systems: the integumentary, circulatory, skeletal, digestive, muscular, nervous, respiratory, excretory and the reproductive systems.
Frogs, reptiles, and most birds have unitary excretion and reproductive organs known as a cloaca.
excretory organ of housefly
The skin is both a sense and excretory organ.
The contractile vacuole is the excretory organ in the amoeba.
What is the excretory organ of a grasshopper?
nephridia is the main excretory organ of annelida
The excretory organ of a scorpion is the coxal glands and malpighian tubules. The excretory organ is also found in other arachnids such as spiders.
skin, lung, kidney
The main organ in the excretory system is the kidney. The kidney is the main organ that controls the excretory systems for vertebrates. It is also part of the Urinary system which is part of the excretory system.
Why is the kidney the major excretory organs?
Urinary or excretory system.
The excretory organ of agama lizard