Plant Epidermis and Water Conservation

Protection against loss of water, mechanical injury, and invasion by parasitic fungi.

Stomata are small pores in the epidermis of the leaf, enclosed by two kidney-shaped guard cells. They are necessary for exchanging gases with the atmosphere and for transpiration.

Water absorption, aided by the long hairlike parts that greatly increase the total absorptive surface area.

<p>Because they have a protective role to play and form a barrier against water loss, mechanical injury, and invasion by parasitic fungi.</p> Signup and view all the answers

<p>Carrying oxygen and food to all cells, collecting wastes from all parts of the body and carrying them to the liver and kidney for disposal.</p> Signup and view all the answers

<p>Epithelial tissue, connective tissue, muscular tissue, and nervous tissue.</p> Signup and view all the answers

<p>Epithelium covers most organs and cavities within the body, including the skin, lining of the mouth, lining of blood vessels, lung alveoli, and kidney tubules.</p> Signup and view all the answers

<p>The permeability of the cells of various epithelia plays an important role in regulating the exchange of materials between the body and the external environment and also between different parts of the body.</p> Signup and view all the answers

<p>It provides waterproofing and prevents water loss.</p> Signup and view all the answers

<p>The outer layer of a branch contains cork cells, while the outer layer of a young stem contains primary meristem.</p> Signup and view all the answers

<p>Transporting water and minerals vertically.</p> Signup and view all the answers

<p>The main components are sieve cells, sieve tubes, companion cells, phloem fibres, and phloem parenchyma. The phloem transports food from leaves to other parts of the plant.</p> Signup and view all the answers