Spongy tissue with large and regularly arranged air spaces provide floating buoyancy to acquatic plants. Plants are lacking of connective tissue while cellulose microfibrils, as part of interconnected cell walls, and swollen cell bodies themselves ensure mechanical support.

Dr Michel Spina thank you for your contribution to the discussion

Aerenchyma is a spongy tissue with large intercellular air spaces that is found in aquatic plants. It provides buoyancy and allows the circulation of gases. Chlorenchyma tissue does not help the plant to float in water; a special type of parenchyma tissue called aerenchyma helps plants to float in water. It is present in aquatic and some land plants. Aerenchyma is the spongy tissue that has air spaces or channels where the air is trapped, especially in the stem of the hyacinth. The stem part becomes buoyant and due to this, the water hyacinth floats on the surface of the water. Aerenchyma helps in buoyancy as well as in the respiration of aquatic plants. Aquatic plants float on water because they have buoyancy because of the presence of large air cavities in their parenchyma, and the parenchyma is known as aerenchyma. This makes them float on water. Collenchyma tissue is composed by elongated living cells of uneven primary thick walls, which possess hemicellulose, cellulose, and pectic materials. It provides support, structure, mechanical strength, and flexibility to the petiole, leaf veins, and stem of young plants, allowing for easy bending without breakage.Cartilage is a strong, flexible connective tissue that protects your joints and bones. It acts as a shock absorber throughout your body.Cartilage is an important structural component of the body. It is a firm tissue but is softer and much more flexible than bone. Cartilage is a connective tissue found in many areas of the body including: Joints between bones e.g. the elbows, knees and ankles. Cartilage is an important structural component of the body. It is a firm tissue but is softer and much more flexible than bone. Cartilage is a connective tissue found in many areas of the body including: Joints between bones e.g. the elbows, knees and ankles. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. This gives strength and flexibility to the tissue. Cartilage is a non-porous connective tissue with a thick intercellular substance called the matrix. It is semi-transparent and elastic. It is found in the softer areas such as ear lobes, trachea and intervertebral disc where it provides flexibility.