Which characteristic is a similarity among all types of cart
     Which characteristic is a similarity among all types of cartilage?  Cartilages consist of primarily inorganic phosphates and calcium.  All types of cartilage are replaced by bone tissue.  All types of cartilages consist of 60-80% water.  All types of cartilage lack fibers. 
  
  Solution
Cartilage : It is a connective tissue composed of cells called chondrocytes. It forms a supporting framework for some organs, such as walls of airways where it prevents airway collapse. The cartilage is made up of cells called chondroblasts and chondrocytes, an extracellular matrix , made up of 10% of aggrecan, 75% water, and a mix of collagen fibres and other constituents. So, the answer is option D.

