Answer the questions relating to the image of the lung, below: If the structure

Question

Answer the questions relating to the image of the lung, below: If the structure indicated by C is a blood vessel, its innermost lining would consist of Choose answer from the following options 1. An airway surrounded only by blood vessels, with no connective tissue components 2. Chondrocytes embedded in extracellular matrix of collagen, proteoglycans and water 3. A small airway composed of hyaline cartilage, smooth muscle with little extracellular matrix or epithelial cells 4. Simple cuboidal epithelial cells 5. Elastic cartilage 6. Endothelial cells 7.Loose connective tissue 8. Stratified squamous cells 9.An airway surrounded by alveolar epithelial cells, blood vessels and elastic and collagen fibers. 10.Fibrocartilage

Explanation / Answer

Option 6. Innermost lining of blood vessels is known as tunica intima which is made up of endothelial cells and supported by a continous layer of sub- endothelial layer of connective tissue. Also, elastic fibres are surrounded nearby the lining apart from the capillaries and venules that supply oxygen.

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