mucous
Both forms have a single Body_orificeand body cavity that are used for digestion and Respiration_(physiology), so yes, cnidarians do have a respiratory system.
Serous membrane (mesothelium) forms the wall of the peritoneal cavity.
mucus secretion is important because your body needs to keep your mouth, nasal cavity (the inside of your nose)and lungs moist and to keep the mucus membranes protected. it also is found in the stomach and intestines.
What is the dome-shaped sheet of muscle that forms the bottom of the chest cavity?The dome-shaped sheet of muscle that forms the bottom of the chest cavity is called Diaphragm.
Ciliated and pseudostratified columnar epithelial cells plus goblet cells for the secretion of mucin.
Epithelial tissue forms the covering of the outside of the body, as well as the lining of the GI and respiratory tracts. It's functions include protection (skin), secretion (hormones, sweat, enzymes, etc.), and absorption (nutrients and water in the GI tract).
It should only be capitalized if it forms part of a title.
Frontal bone
pseudocoelom
It forms the outer covering of the body known as the free surface of the skin. It also forms the lining of the digestive, respiratory, and urinary tracts; blood and lymph vessels; serous cavities (cavities which have no communication with the outside of the body, and whose lining membrane secretes a serous fluid), such as the peritoneum or pericardium; and tubules (small tubes which convey fluids) of certain secretory glands, such as the liver and kidneys. Short answer: protection, secretion and absorption.
forms because of the expension of the epiblast layer
Frontal