2
Nematodes have two main openings: the mouth (also known as the oral opening) located at the anterior end, and the anus at the posterior end. These openings are crucial for their feeding and excretion processes, allowing them to consume food and eliminate waste efficiently.
Sea urchins have two primary body openings: the mouth and the anus. The mouth is located on the underside of their body and is surrounded by a structure called Aristotle's lantern, which they use for feeding. The anus is found on the top side, allowing for the expulsion of waste. These openings play essential roles in their feeding and digestion processes.
Two
They have one according to my science text book.
no, theres one opening
A "tube" is normally defined as having two openings, one at each end.
Nostril I'm taking anatomy (:
The bladder has two main openings: the ureters, which are the tubes that carry urine from the kidneys to the bladder, and the urethra, which is the tube through which urine exits the body. In total, there are three openings when considering the bladder's anatomical structure: two ureteral openings and one urethral opening.
The famous animal the "Porifera", has 6 body openings.
One opening for the urethra and two for the ureters.
yes, planarians have one opening in their digestive system
The nostrils / nares are the openings in the nose.