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Tissues
What are epithelial tissues?
Epithelial Tissues is the tissue that forms a protective covering on an external or internal surfaces of the animals. The cells are tightly packed and form a continuos sheet. These tissue have no intercellular spaces and have small amount od cementing material between them. An epithelial tissue may be composed of one (simple epithelium) or more layers of cells (compound epithelium). The skin, surface layers of mouth, alimentary canal, lungs etc. are made of epithelial tissues. It also forms a barrier to keep different body system separate and also regulates the exchange of materials between the body and the external enviroment.
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By which instrument you can see internal structure of onion peel cell?
Do different organisms have different types of basic building units ? Briefly explain.
To what the shape and size of cells are related to?
What constitute the basic building block of the cell?
Can you find out more names of some of the unicellular organisms and fungi, other than given in your book?
Name two single celled animals.
Draw diagram of onion peel as it is seen through microscope.
Draw labelled diagram of compound microscope.
Name three features which are found almost in every cell.
Which is the outer most covering of an animal cell?
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