The latest stage of the excretory system which we have studied is in a young Fish of about 11 centims.
(d) The digestive glands have also been shown to be excretory (5, p. 270).
The urinary tubules are excretory organs which carry off, in solution, the waste products of the fleas body.
One of the prominent openings admits the food and the water required in respiration, the other is the excretory aperture.
The Aplacophora are symmetrical, having the mouth and the excretory opening at the anterior and posterior ends respectively.
There is still considerable doubt as to the mode of formation of the excretory tubes of the Chtopoda.
The mouth is at one end, the excretory opening at the other, and along the body are double rows of tube-feet.
Hatschek (No. 514) has given a very interesting account of the development of the excretory system in Polygordius.
The same is the case with the vascular system, notably the heart and the veins, and with the excretory organs.
The former are usually segmentally arranged, and resemble in many respects the excretory tubes of the Chtopoda.
excretory ex·cre·to·ry (ěk'skrĭ-tôr'ē)
Of, relating to, or used in excretion.