Q:

What is the function of the spongy layer in a leaf?

A:

Quick Answer

The spongy layer of a leaf features small air spaces between cells that allow for the exchange of gases in photosynthesis. Together with the palisade, the spongy layer makes up the mesophyll of the leaf.

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Full Answer

Spongy cells of the leaf are loosely packed together and lie between the palisade and the lower epidermis with the air spaces connected to each other and the outside by stomata. The spaces between cells create a larger surface area. The cells release water vapor and oxygen and pick up carbon dioxide during the day. It is also believed that the spongy layer acts as a temporary storage space for sugars and amino acids that have been synthesized in the palisade layer.

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Related Questions

  • Q:

    What is the function of the spongy layer?

    A:

    The main function of the spongy layer inside the leaf is the diffusion of carbon dioxide gas through the air spaces found in this region. The spongy layer is part of the mesophyll and consists of irregular-shaped cells and air spaces. Inside the leaf, the mesophyll is the central part that is composed of the palisade and spongy mesophyll.

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  • Q:

    How is a leaf adapted to carry out photosynthesis?

    A:

    Leaves are adapted for carrying out photosynthesis by virtue of their flat shape and periodic replacement, and because they contain most of the plant’s chlorophyll. Leaves are the primary location in which photosynthesis occurs, so plants often arrange their leaves to receive the most solar radiation.

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  • Q:

    How do non-vascular plants excrete?

    A:

    Non-vascular plants excrete excess gases produced by cellular respiration and photosynthesis through diffusion, the movement of molecules from a concentrated area to an area of low concentration. Mosses and algae excrete and take in oxygen and carbon dioxide with the environment through this process.

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  • Q:

    What is the outer layer of a leaf called?

    A:

    The outer layer of leaves is called the cuticle. The cuticle is a waxy coating that protects the leaf and prevents water loss. In some leaves, the cuticle may be visible due to its shine.

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