The lower epidermis contains stomata cells that help prevent water loss and regulate the exchange of gases such as oxygen and carbon dioxide, enabling plants to survive. Other cells in the lower epidermis include a waxy ... More »

The upper epidermis, or stratum corneum, functions to protect the lower layers of skin and the tissues beneath from both physical and chemical damage. It is composed of plates made from dead skin cells, toughened against... More »

The skin is made up of three layers, including the epidermis, dermis and hypodermis, according to the American Academy of Dermatology. While there are technically no upper and lower epidermises, these terms are often use... More »

A stomata is the part of a plant that allows gases such as oxygen and carbon dioxide to move freely into and out of a leaf. Every plant with above-ground leaves has stomata. More »

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The stomata in plant cells can be found in the epidermis of leaves, stems and other parts of the plant involved in gas exchange. The pores inside the spongy layer of the plant leaf help aid in the exchange of gases betwe... More »

The two gases that move in and out of the stomata on plant leaves are carbon dioxide and oxygen. The exchange of these two gases plays a vital role in photosynthesis, which is the process by which plants use light to pro... More »

During photosynthesis, plants make glucose and oxygen from carbon dioxide and water. To do this, they need energy in the form of light from the sun. While plants use glucose as energy, oxygen enters the atmosphere for us... More »