The word "animal" comes from the Latin animalis, meaning having breath, having soul or living being. In everyday non-scientific usage the word excludes humans that is, "animal" is often used to refer only to non-human members of the kingdom Animalia; often, only closer relatives of humans such as mammals, or mammals and other vertebrates, are meant. The biological definition of the word refers to all members of the kingdom Animalia, encompassing creatures as diverse as sponges, jellyfish, insects, and humans.

All animals have eukaryotic cells, surrounded by a characteristic extracellular matrix composed of collagen and elastic glycoproteins. This may be calcified to form structures like shells, bones, and spicules. During development, it forms a relatively flexible framework upon which cells can move about and be reorganized, making complex structures possible. In contrast, other multicellular organisms, like plants and fungi, have cells held in place by cell walls, and so develop by progressive growth. Also, unique to animal cells are the following intercellular junctions: tight junctions, gap junctions, and desmosomes.

What are the answers to this following set of questions:

1. Animal originates from what language?
2. Animal excludes what species?
3. To which kingdom does it refer?
4. Animals have which type of cells?
5. What makes up their matrix?
6. What structures form if these components calcify?
7. Do plants have the same cell characteristics?
8. What holds plant cells together?
9. How do plant cells develop?
10. What characteristics are specific to animal cells?
1. Latin
2. humans
3. Animalia
4. eukaryotic cells
5. collagen and elastic glycoproteins
6. shells, bones, and spicules
7. No
8. cell walls
9. progressive growth.
10. intercellular junctions