What are the two principal types of connective tissue in a muscle? a. collagen and myofibrils b. myofibrils and elastin c. myofibrils and disks d. elastin and collagen?

Connective tissue in the muscle is made up of two proteins called collagen and elastin. Although collagen is seen mostly in and around the muscle fibres and tendon. Collagen is an elongated protein that forms extremely strong but very small fibrils. These fibrils bound together to form collagen fibres which is seen in microscope. Elastin on the other hand, is bundles of proteins in extracellular matrix of connective tissue and produced by fibroblasts and smooth muscle cells in arteries. Elastin fibres may be stretched to several times their original length but rapidly resume original length once released.

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