INTRODUCTION TO MICROSCOPY CELL BIOLOGY
GOLGI
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The interior of a vessel, such as the central space in an artery, vein or capillary through which blood flows.
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They are one of the building blocks of body tissue and can also serve as a fuel source.
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structure within or outside a cell, consisting of liquid or cytoplasm enclosed by a lipid bilayer.
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None of the above
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Detailed explanation-1: -In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine. It comes from Latin lumen ‘an opening’.
Detailed explanation-2: -All blood vessels are basically hollow tubes with an internal space, called a lumen, through which blood flows. The lumen of an artery is shown in cross-section in the photomicrograph below. The width of blood vessels varies, but they all have a lumen. The walls of blood vessels differ depending on the type of vessel.
Detailed explanation-3: -The final branches of the circulatory system are the capillaries. Blood capillaries have a very thin lumen for the proper exchange of nutrients and gases. The lumen of the capillaries is very small because the blood flow here is too slow for the maximum exchange process.