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. QUESTIONS:

Q1:
1. What language does the word animal come from?
2. What are the origins of the term animal?
3. 
Q2:
1. What species is excluded from the term animal in non scientific usage?
2. What isn't considered an animal in every day use of the term?
3. 
Q3:
1. What kingdom does animal refer to?
2. Which kingdom are animals members of?
3. 
Q4:
1. What is the nature of animals' cells?
2. What sort of cells do all animals have?
3. 
Q5:
1. What makes up the matrix of eukaryotic cells?
2. What are eukaryotic cells composed of?
3. 
Q6:
1. What does the calcification of collagen and elastic glycoproteins create?
2. What structures are formed if collagen and elastic glycoproteins calcify?
3. 
Q7:
1. Do plants have the same cell characteristics as animals?
2. Are plant cells structurally similar to animal cells?
3. 
Q8:
1. How are plant cells held in place?
2. What keeps the structure of plant cells solid?
3. 
Q9:
1. What is the devleopment of plant cells like?
2. In what manner do plant cells grow?
3. 
Q10:
1. What characteristics are unique to the cells of animals?
2. What facet do only animals cells have?
3. 
