no
Annelida
platyhelminthes
platyhelminthes
platyhelminthes
aschelminthes
lubricates and protects digestive tract
This space is called coelom or body cavity .
No, mollusks have a true coelom instead of a pseudocoelom. The coelom is a part of mollusks and annelids that is a cavity within the mesoderm that is filled with fluid.
The layer of the GI tract that functions by secreting a lubricating fluid is the mucosa. The mucosa layer is responsible for producing mucus, which acts as a lubricant to facilitate the movement of food through the digestive system. The mucus also protects the digestive organs from the effects of digestive enzymes and stomach acid.
The anus is the last part of the digestive tract.
Head and neck cancers involve the respiratory tract and the digestive tract; and they interfere with the functions of eating and breathing. Laryngeal cancers affect speech.
That wavelike movement of the digestive tract is known as peristalsis.