In most leaves, the primary photosynthetic tissue, the palisade mesophyll, is located on the upper side of the blade or lamina of the leaf but in some species, including the mature foliage of Eucalyptus, palisade mesophyll is present on both sides and the leaves are said to be isobilateral.

The major tissues are mesophyll, veins, and epidermis. Mesophyll makes up most of the leaf’s interior. This is where photosynthesis occurs. Mesophyll consists mainly of parenchymal cells with chloroplasts.

Mesophyll cells The mesophyll is located between the upper and lower layers of the leaf epidermis, and is mostly made up of parenchyma (ground tissue) or chlorenchyma tissue. The mesophyll is the primary location for photosynthesis and is divided into two layers, the upper palisade layer and the spongy mesophyll layer.

Collenchyma tissue

Aerenchyma is found in aquatic, marshes and plants. So the option A (hydrophytes) is correct.

There are two kinds of vascular tissue: xylem, which conducts water and nutrients up from the roots, and phloem, which distributes food from the leaves to other parts of the plant.

Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands.

Simple epithelial tissues are generally classified by the shape of their cells. The four major classes of simple epithelium are: 1) simple squamous; 2) simple cuboidal; 3) simple columnar; and 4) pseudostratified.

The number of cell layers and cell types together give rise to 6 different types of epithelial tissue.

• Simple squamous epithelia.
• Simple cuboidal epithelia.
• Simple columnar epithelia.
• Stratified squamous epithelia.
• Stratified cuboidal epithelia.
• Stratified columnar epithelia.

Despite there being many different types of epithelial tissue all epithelial tissue have just five characteristics, these are cellularity, polarity, attachment, vascularity, and regeneration.

• Cellularity. Epithelia are composed almost entirely of cells.
• Specialized contacts. Adjacent epithelial cells are directly joined at many points by special cell junctions.
• Polarity.
• Support by connective tissue.
• Avascular but innervated.
• Regeneration.

Epithelial Tissue: There are three principal classifications associated with epithelial cells. Squamous epithelium has cells that are wider than they are tall. Cuboidal epithelium has cells whose height and width are approximately the same. Columnar epithelium has cells taller than they are wide.

What are characteristics of connective tissues? Share three basic components: (1) specialized cells, (2) extracellular protein fibers and (3) a fluid known as ground substance.

Connective tissue fibers and matrix are synthesized by specialized cells called fibroblasts. There are three main groups of connective tissues: loose connective tissue, dense connective tissue, and specialized connective tissue.

Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. These fibers hold connective tissues together, even during the movement of the body. Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins.

Which of the following is not an example of connective tissue? Explanation: Skin is composed of epithelial cells, and is therefore not an example of connective tissue. The major types of connective tissue include bone, adipose, blood, and cartilage.

7 Types of Connective Tissue

• Cartilage. Cartilage is a type of supporting connective tissue.
• Bone. Bone is another type of supporting connective tissue.
• Adipose. Adipose is another type of supporting connective tissue that provides cushions and stores excess energy and fat.
• Blood.
• Hemapoetic/Lymphatic.
• Elastic.
• Fibrous.

Connective tissue proper includes: loose connective tissue (also called areolar) and dense (irregular) connective tissue. Specialized connective tissue types include: dense regular connective tissue, cartilage, bone, adipose tissue, blood, and hematopoietic tissue.

Blood is considered a connective tissue because it has a matrix. The living cell types are red blood cells, also called erythrocytes, and white blood cells, also called leukocytes. Erythrocytes (red blood cells), the predominant cell type, are involved in the transport of oxygen and carbon dioxide.

Blood is made mostly of plasma, but 3 main types of blood cells circulate with the plasma:

• Platelets help the blood to clot. Clotting stops the blood from flowing out of the body when a vein or artery is broken.
• Red blood cells carry oxygen.
• White blood cells ward off infection.

Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in. Red blood cells are responsible for carrying oxygen and carbon dioxide. Platelets are responsible for blood clotting. White blood cells are part of the immune system and function in immune response.

Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues. forming blood clots to prevent excess blood loss. carrying cells and antibodies that fight infection.