A plant has two organ systems: 1) the shoot system, and 2) the root system. The shoot system is above ground and includes the organs such as leaves, buds, stems, flowers (if the plant has any), and fruits (if the plant has any).

Explain why a leaf is described as an organ, not a tissue. A leaf is composed of more than one type of cell, therefore is an organ (tissues only contain one type of cell.) A leaf also performs various functions (e.g. transpiration, photosynthesis, protein synthesis) while a tissue performs only a specific function.

Bones are organs that consist primarily of bone tissue, also called osseous tissue.

Key points. Humans—and other complex multicellular organisms—have systems of organs that work together, carrying out processes that keep us alive. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs.

In biology, an organ (from the Latin “organum” meaning an instrument or tool) is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Your heart, kidneys, and lungs are examples of organs.

Tommy, xylem is a tissue not an organ because it fits the definition of a tissue , similar cells joined together to preform specific functions, but not an organ, group of many different tissues joined together to perform several functions.

It is common to classify wood as either softwood or hardwood. The wood from conifers (e.g. pine) is called softwood, and the wood from dicotyledons (usually broad-leaved trees, e.g. oak) is called hardwood.

wood noun (MATERIAL) a hard substance that forms the branches and trunks of trees and can be used as a building material, for making things, or as a fuel: He gathered some wood to build a fire. A flute is made of wood or metal in three jointed sections. In cheap furniture, plastic is often used to simulate wood.

This supporting tissue is composed of two main types of cells. The first type is the fiber cell, which is elongated and has tapering ends that can interlock with other fiber cells. These elastic, interconnected cells have great tensile strength and provide flexibility in the stem and roots.

They have the genetic material of the cell. It maintains the activities of the cell and also stabilizes the integrity of the genes. Since the nucleus forms the epicenter of the cell, without them a cell is called as dead cell.

sclerenchyma cells

Necrosis