EVERYDAY SCIENCE

Detailed explanation-1: -A loosely packed layer of irregularly-shaped cells. Air spaces that surround this cell layer allow gas exchange to take place.

Detailed explanation-2: -Below the palisade parenchyma are seemingly loosely arranged cells of an irregular shape. These are the cells of the spongy parenchyma (or spongy mesophyll). The intercellular air spaces found between mesophyll cells facilitate gaseous exchange.

Detailed explanation-3: -Spongy mesophyll tissue is packed loosely for efficient gas exchange. The spongy mesophyll cells are covered by a thin layer of water. Gases dissolve in this water as they move into and out of the cells.

Detailed explanation-4: -Spongy mesophyll-loosely packed cells with large air spaces between them. The air spaces allow movement and exchange of gases, specifically oxygen, carbon dioxide, and water vapor. Spongy mesophyll cells also contain chloroplasts.

Detailed explanation-5: -Palisade mesophyll cells are densely packed together, whereas spongy mesophyll cells are arranged more loosely to allow gases to pass through them.