Elastic connective tissue forms
A. bones.
B. branching networks or parallel strands.
C. cartilage.
D. ligaments and tendons.
The Correct Answer and Explanation is:
The correct answer is B. branching networks or parallel strands.
Explanation
Elastic connective tissue is a specialized type of connective tissue that is rich in elastic fibers, which gives it unique properties essential for the function of various body structures. Unlike other types of connective tissues, such as bone, cartilage, or dense connective tissues found in ligaments and tendons, elastic connective tissue is primarily characterized by the presence of a high concentration of elastin, a protein that allows tissues to stretch and return to their original shape.
The arrangement of elastic fibers in elastic connective tissue can be seen as either branching networks or parallel strands. These fibers are typically organized in a way that allows them to provide both flexibility and resilience. For instance, in the lungs, elastic connective tissue helps maintain the shape of the alveoli (air sacs) during inhalation and exhalation, allowing the lungs to expand and contract effectively. Similarly, in large arteries, such as the aorta, elastic connective tissue helps accommodate the high pressure of blood being pumped from the heart, enabling the artery to stretch and recoil with each heartbeat.
This distinctive structure is what differentiates elastic connective tissue from other connective tissues. In contrast, A. bones are hard and rigid due to a matrix of mineralized substances; C. cartilage is a semi-rigid connective tissue that provides support and flexibility but lacks the elasticity found in elastic connective tissue; and D. ligaments and tendons, while made up of dense connective tissue, primarily contain collagen fibers that provide tensile strength rather than the elasticity characteristic of elastic connective tissue.
In summary, elastic connective tissue is specifically designed for structures requiring flexibility and the ability to stretch without losing their shape, making option B the correct choice.