In Plants. Multicellular organisms are organised into increasingly complex parts. Complex tissue is composed of more than one kind of cells. Xylem and Phloem are complex permanent tissues and are found in the vascular bundles in the plants. There are at least 200 different cell types in the human body. In order, from least complex to most complex: The different types of animal tissues include: Xylem Tissue. Through cell differentiation, tissues as different as brain tissue and muscle are formed from the same single cell. The 4 Basic Tissue Types in the Human Body www.exploringnature.org Tissues are groups of cells with a common structure (form) and function (job). Complex Tissues Tissues composed of more than one cell type are generically referred to as complex tissues. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and includes three different cell types: vessel elements and tracheids (both of which conduct water), and xylem parenchyma. Differentiation allows cells to develop into the four major tissue types: epithelial tissue, nervous tissue, connective tissue and muscle tissue. The complex tissues are generally heterogeneous in nature, being com­posed of dissimilar types of cell elements. Xylem is a multifaceted tissue forming a part of the vascular bundle. Complex tissues are of two types. Complex Permanent Tissues: The complex tissue consists of more than one type of cell having a common origin. These tissues vary in their structure, function, and origin.The animal tissues are divided into epithelial, connective, muscular and nervous tissues. Let us have a glimpse of each type of animal tissue in detail. Types of Animal Tissue. Complex Permanent Tissue. While the plant lifecycle sometimes seems alien and complex, the process of cell differentiation is very similar. Complex tissues are made up of more than one type of cells and they work together as a unit. Tissues are groups of similar cells that have a common function. Complex tissues are of two types: Xylem or wood and phloem or bast. All these cells coordinate to perform a common function. The simplest living creatures are single cell creatures, but in complex life forms, such as human beings, cells also exist in the tissue level. They are two types, namely Xylem tissue and Phloem tissue. While there are different hormones involved, all plants also develop from a single cell. These different types of cells coordinate to perform a function. The animal cells are grouped together to form animal tissues. Unlike simple permanent cells which look the same and are made up of one type of cells, complex permanent tissues are made up of more than one type of cells. They transport water, salt and prepared food material to various parts of the plant body. A tissue membrane is a thin layer or sheet of cells that either covers the outside of the body (e.g., skin), lines an internal body cavity (e.g., peritoneal cavity), lines a vessel (e.g., blood vessel), or lines a movable joint cavity (e.g., synovial joint). Tissue Membranes. The four basic tissue types are epithelial, muscle, connective, and nervous tissue. Some that you'll need to know best include specialized blood cells, specialized nerve cells and specialized … There are four main tissues in the body – epithelium, muscle, connective tissue and nervous tissue. - Xylem - Phloem (bast) Xylem and Phloem are also called vascular tissue and together they constitute vascular bundles. Each tissue type has a characteristic role in the body: Xylem and phloem are the two most important complex tissues in a plant, as their primary functions include the transport of water, ions and soluble food substances throughout the plant. Cells, tissues, organs and systems. 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