Osteoarthritis involves the entire joint, including the nearby muscles, underlying bone, ligaments, joint lining (synovium), and the joint cover (capsule). 1  Osteoarthritis also involves progressive loss of cartilage.
This allows the daughter and parent cells to have an equal amount of genetic material. The last stage is telophase, and this is where cytokinesis in animals takes place. When an animal cell begins to divide, it is attributed to a structure called a contractile ring. The contractile ring tightens tighter and tighter by a protein called myosin and eventually makes a burrow called a cleavage burrow..
Animal cells do contain a similar, but smaller, organelle called a lysosome. The lysosome is formed by pinching off a piece of the Golgi apparatus. The lysosome contains strong enzymes that are able to rapidly break down toxins, cell-invaders and even whole cells. Also animal cells have structures called centrioles.nimal cells do contain a similar, but smaller, organelle called a lysosome. The lysosome is formed by pinching off a piece of the Golgi apparatus. The lysosome contains strong enzymes that are able to rapidly break down toxins, cell-invaders and even whole cells. Also animal cells have structures called centrioles.