Multiple Choice
Epithelial membranes are composed of which two types of tissues?
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4. Tissues & Histology
Introduction to Epithelial Tissue
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In anatomy, particularly when describing epithelial-lined organs and tubes, what is the lumen?
A
The basement membrane underlying an epithelium
B
The outermost connective tissue layer surrounding an organ
C
The open internal space (cavity) within a tubular or hollow organ, such as a blood vessel or intestine
D
A type of epithelial cell that secretes mucus
Verified step by step guidance1
Understand that in anatomy, the term 'lumen' refers to a specific part of tubular or hollow organs lined by epithelium.
Recall that epithelial tissues line surfaces and cavities of organs, creating a boundary between the inside and outside environments.
Identify that the lumen is the open internal space or cavity inside these organs, such as the inside of blood vessels, intestines, or other hollow structures.
Differentiate the lumen from other anatomical structures: it is not the basement membrane (which supports the epithelium), nor the outer connective tissue layer, nor a type of epithelial cell.
Conclude that the lumen is essentially the hollow passageway through which substances like blood, food, or mucus travel within these organs.
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