Science Question about cells and such!?

Question

Three different cell shapes??..please give source.♥thanks

Name, the flattened cells, important in protection that fit together like tiles. (this is just one example of the generalization that a cell's structure is very closely related to its function in the body.) ????

thank youu sOo much if you can help me...I would really really appreciate it..and don't think im not learning anything by you helping..b/c I am =]

l8er. <33

Answer 1

Well, there lots of shapes, but three common forms are cuboidal shaped cells (which are like cubes), squamous cells (which are like cuboidal except flattened), and then there are columnar cells (which are shaped like columns).

As for the flattened cells you mention that are important for protection, that is clearly referring squamous epithelial cells. Every lumen of our bodies has a layer of epithelium surrounding it, partly for protection; the cells of these layers can be a variety of shapes, but squamous is common. Skin, for example, is squamous epithelial tissue. And yes, these cells fit together like tiles, so their shape is very important to the barrier function they serve. Epithelial cells can form different kinds of junctions between each other. One type, called a 'tight junction', causes the cells to bind to each other extremely close.

Answer 2

No. Stem cell research is on-going. New discoveries are being reported on all the time. There is only one unresolved issue: the President does not authorize spending federal tax dollars on embryonic stem cell research, on moral grounds. The private sector does not want to spend money on embryonic stem cell research because there have been no developments, no signs that the research will turn up anything. So, people with self interests want the government to foot the bill.

Answer 3

Osteoblast

Answer 4

Try this site.