Before she began treating an affected animal, which usually included surgically removing the tumor, she would ask her client to sign a release allowing part of the tumor tissue to be used for her ...

For example, millions of muscle cells make up muscle tissue. An organ is made from two or more tissues, which all work together to do a particular job, like the heart in animals or a leaf in a plant.

While some mechanisms for three-dimensional shapes have been explored, they are not sufficient to explain the diversity of animal tissue forms. For example, during a process in the development of ...