Question

Mammalian bone differs from cartilage in the presence of ________
A.Lymph vessels
B.Collagen
C.Blood vessels
D.Haversian canals

Answer 1

Hint: Cartilage is made up of specialised cells known as chondrocytes, which contain a significant quantity of extracellular collagenous matrix, a plentiful material abundant in proteoglycan or elastin fibres.

Complete answer:
First we should know about cartilage to answer this question. Cartilage, a rubber-like padding which surrounds and supports the ends of long bones at the nerves or joints, is a durable and smooth elastic tissue and is a structural part of the ear, rib cage, bronchial tubes, nose, intervertebral discs, and several other parts of the body. It is not as heavy and strong as the body, but much tighter than the muscle and far less flexible.
 Now, let us find the solution from the options-
- Endothelial cells are lined with lymph vessels which have a thin coating of smooth muscle or adventitia that connects the lymph vessels to the tissue around them. The power generation of the lymph vessels from the lymph capillaries is concerned mainly with the uptake of interstitial fluid from the tissues. Thus, option A is not the correct option.
- In the extracellular matrix that is present in the different connective tissues of the body, collagen is the most abundant structural protein. As the main ingredient of connective tissue, it is the most major form in mammals, responsible for 25% – 35% of the protein content of the entire body. Thus, option B is not the correct option.
- Blood vessels are the elements that bring blood in the human body via the circulatory system. These vessels carry the tissues of the body with blood cells, foods, and oxygen. Thus, option C is not the correct option.
- A narrow channel that ramifies in the compressed bone is the Haversian canal. A central tube is formed around which there additional layers of bone matrix or lacunae comprise bone cells. Minute channels named canaliculi bind the lacunae.

Hence, the correct answer is option (D)

Note: No blood vessels or nerves comprise cartilage. The chondrocytes are provided with nutrients through diffusion. Articular cartilage compression or elastic cartilage flexion produces air flow that helps to disperse nutrients to chondrocytes.