protonephridia, metanephridia... Gills?
lungs kidney skin
The three organs that excrete are the lungs, the skin but most of all the kidneys.
Arteries, veins and capillaries are the three major types of blood vessels. They are all found in organs.
The excretory system contains a pair of nephridia in every segment, except for the first three and last one.There are three types of nephridia : integumentary, septal and pharyngeal nephridia. The integumentary nephridia lie attached to the inner side of the body wall in all segments except the first two. The septal nephridia are attached to both sides of the septa behind the 15th segment. The pharyngeal nephridia are attached to 4th, 5th and 6th segment. The nitrogenous wastes are removed by the rhythmic beating of the cilia of the nephridiostomes. The excretory wastes are then finally discharged into the gut.
The three levels found in multicellular organisms are cells, tissues, and organs. Cells make up tissues, tissues make up organs, and organs work together in organ systems to carry out specific functions for the organism.
Three body organs are: the brain, the heart, the liver.
Solid, fluid and gaseous.
any invertebrate animal with a three-layered body and a pseudocoel
any invertebrate animal with a three-layered body and a pseudocoel
Three substances are water, nitrogen, and access salts.
1. Lungs. 2. Skin. 3. Kidneys.
a unibrow on a unicorn with three kajillion coconuts