Some groups have attempted to use animal tissues to produce suitable matrices (Steinhoff et al. 2000). Different technologies have been developed to acellularize these tissues.

[…] he filled all their throats with it, so that those poor wretches were by it made to cough like foxes, crying, Ha, Pantagruel, how how thou addest greater heat to the firebrand that is in us.

Love's feeling is more soft and sensible Than are the tender horns of cockl’d snails;

The artists are forced endlessly to carve figures of elephants and leographs of chinthes.