$(a)$ Identify the given figures.
$(b)$ State in brief their structure.
$(c)$ Describe the role performed by the two.

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(N/A) $(X)$ is a tracheid,and $(Y)$ is a vessel.
$(b)$ Both are tubular structures. They consist of dead cells with thick,lignified walls.
$(c)$ Both tracheids and vessels are components of the xylem tissue and are primarily responsible for the vertical transport of water and dissolved minerals from the roots to the rest of the plant.

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Write true $(T)$ or false $(F)$ for the following statements:
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$(b)$ The lining of blood vessels,lung alveoli,and kidney tubules are all made up of epithelial tissue.
$(c)$ Epithelial cells have a lot of intercellular spaces.
$(d)$ The epithelial layer is a permeable layer.
$(e)$ The epithelial layer does not allow the regulation of materials between the body and the external environment.

State any three points of difference between your limb and heart muscles.

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