1 The can is transported to a processing facility. 2  A giant magnet lifts out cans that are made of metals such steel. Since aluminum cans aren't magnetic, they drop down to a conveyor belt and are gathered. 3  The aluminum is shredded, washed and turned into aluminum chips.  The chips are melted in a large furnace.
Osculum The osculum is an excretory structure in the living sponge, a large opening to the outside through which the current of water exits after passing through the spongocoel. Wastes diffuse into the water and the water exits through the osculum at a velocity of nearly 8.4 cm/second, carrying away with it the sponge's wastes. The size of the osculum is regulated by the myocyte. Its size, in turn, determines the amount of water flowing through the sponge. References
cartilage lacuna. any of the small cavities within the cartilage matrix, containing a chondrocyte. Howship's lacuna. the concave cavities which are formed by osteoclasts in the process of bone resorption.osseous lacuna. bone lacuna (see above).acuna, absorption (Howship's lacuna), n an area (pit) of bone resorption, usually irregular in outline, and often containing osteoclasts.