Question

differentiate between elastic fibres and elastic connective tissue

Answer 1

Elastic fibers (or yellow fibers) are bundles of proteins (elastin) found in extracellular matrix of connective tissue and produced by fibroblasts and smooth muscle cells in arteries. These fibers can stretch up to 1.5 times their length, and snap back to their original length when relaxed. Elastic fibers include elastin, elaunin and oxytalan

The labels indicate individual elastin fibers (ef) in the aorta. 
The areas stained pink (between the elastin fibers) contain smooth muscle cells, reticular fibers, and ground substance.

At this magnification you can see black wavy lines. Those are the elastin fibers. When an organ containing these fibers is stretched, the elastin fibers recoil (go back to their original length) and pull the organ back into shape. 

True elastic connective tissue is very rare, and we have no slide specimens that show it. But elastic fibers are present in relatively high concentration in several organs, including the largest arteries in the body. This image shows a portion of the wall of the aorta, the large vessel that carries blood from the heart to the body. Because elastin fibers are so important in the recoil of organs like arteries and lungs, we decided that you should know what they look like.

Answer 2

Answer:

1. It contains elastin and other proteins and glycoproteins. It contains high proportion of elastic fibres. 2. It attaches muscles and bones and one bone to another bone. It is found in the walls of large arteries, ligaments associated with vertebral column and within the walls of the bronchial tubes. 3. It withstands tensile stress when pulling force is applied in one direction or in many direction. It allows recoil of tissues after stretching.