Coelom is lined by which of the following?
Correct answer: D. Both a and b
- A. Parietal mesoderm
- B. Visceral mesoderm
- C. Mesoderm
- D. Both a and b
Explanation
Coelom is a fluid-filled cavity lined by a mesodermal epithelium called mesothelium. It is surrounded by two layers of mesoderm: the parietal mesoderm that lines the body wall and the visceral mesoderm that covers the organs. The mesothelial cells secrete a serous fluid that fills the coelom and allows the organs to move freely.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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