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Organ System

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The cell is the smallest fundamental unit in animals. It is where the structural organization begins. Additionally, tissues are made up of a collection of cells with comparable functions. Organs are created when tissues group together to carry out particular tasks. Cells⇢Tissues⇢Organs⇢Organ system.

  • Cell: the smallest unit that can sustain life on its own and makes up all living things, including the body’s tissues. The cell membrane, the nucleus, and the cytoplasm are the three primary components of a cell. The substances that enter and leave the cell are governed by the cell membrane, which encloses the cell.
  • Tissues: Integrated groups of cells with comparable cellular structures and functions make create tissues. Multicellular animals’ essential framework is provided by these tissues. There are four types of tissues-Epithelial tissues, connective tissue, muscular tissues, and nervous tissue

Organ And Organ Systems

Organ System


Humans and other complex multicellular organisms have coordinated organ systems that perform the functions necessary to sustain life. The body is organized at many stages that progress together. Organ systems are made up of tissues, which in turn are made up of tissues and organs. The coordinated activity of an organ system determines how well it functions. To process food, for instance, the digestive system’s organs work together. The coordinated operation of all organ systems, frequently coordinated by the endocrine and neurological systems, is necessary for the organism to survive.

Animal tissue is made up of a collection of cells. A collection of cells that work together to produce tissue. Multicellular creatures clearly exhibit this type of arrangement. These many tissue clusters band together, arrange themselves and eventually become organs. There are various organs, which join forces to form distinct organ systems. Therefore, higher-order multicellular animals are characterized by their organs and organ systems.

In multicellular animals, the arrangement of the organs and organ systems is essential to the efficient operation of the entire body. An organism is made up of countless millions of cells. Since there are so many cells in humans and other higher-order multicellular creatures, it is essentially impossible for every cell to be in direct contact with the external environment for food and other needs.

Specialized organs and organ systems are necessary to coordinate the actions of these cells. An organ system must work effectively for the organs in that system to engage in their coordinated functions. An organism’s life is ensured by the coordinated and integrated operation of all its organ systems.

Overview of the Organizational Structure

There are various kinds of animal cells and tissues that carry out functions in coordinated ways in humans and other multicellular animals. The epithelial, connective, muscular, and neurological tissues are only a few examples of the various animal tissues found in humans.

Depending on the specific role, all or some of these tissues come together to create the organs in the body. The heart, lungs, stomach, kidney, skin, and liver, for instance, are made up of two or more different types of tissues, each of which has a specific purpose. The heart pumps blood, the lungs breathe in oxygen and exhale carbon dioxide, the skin serves as protection, and so on and so forth.

Organ systems are created when the organs band together. Each organ system needs to function in a coordinated, integrated way. Since there is a division of labor, the end goal won’t be accomplished until they combine. The digestive system, circulatory system, excretory system, respiratory system, lymphatic system, neurological system, skeletal system, etc. are examples of the several organ systems that can be observed in humans.

How do two to three Organs Work Simultaneously?

We can see that cells are at the very bottom of the hierarchy of levels of organization in biology. The tiniest units of life, or cells, are the fundamental constituents of all living things. We refer to tissues as groups of cells that cooperate to carry out a certain task or function. Similar to organs, tissues that collaborate to complete a certain duty are referred to as organs. Our hierarchy is completed by groups of organ systems cooperating to create organisms. Organ systems are made up of organs that work together to carry out a set of functions. Organ system interactions with other organ systems interactions make up an organism.

Difference between Tissue and Organ



The body’s tissues are evenly distributed and carry out similar tasks. These contain the same kind of cells. Tissue damage can be restored through the regeneration process. Animals often have connective tissues, muscular tissues, epithelial tissues, and nerve tissues among other types of tissues. They carry out comparatively easy tasks. Organs in plants and animals are composed of tissues, are arranged, and carry out particular tasks. These are constructed of the same tissues. Organs are also repaired as a result of tissue healing. The various organs kinds include the heart, liver, kidneys, and lungs. Organs carry out intricate tasks.

Plant Organ Systems



A shoot system and a root system are the two separate organ systems found in vascular plants. Stems, leaves, and the plant’s reproductive organs make up the shoot system (flowers and fruits). Typically, the shoot system develops above ground, where it can take in the light that is required for photosynthesis. Typically, the root system—which holds the plants up and takes in water and minerals—is underground.

Plant organs 

  • Stem: The shoot system of a plant includes stems. Their primary job is to maintain the plant by holding its leaves, blossoms, and buds. Of course, they also join the roots to the leaves, transferring the plant’s absorbed water and minerals to the rest of the body as well as the sugars produced at the photosynthesis site in the leaves to specific parts of the plant.
  • Roots: Three main tasks are performed by the roots of seed plants: they anchor the plant to the soil, they take up water and nutrients and transport them upward, and they store the byproducts of photosynthesis. Some roots have been altered to exchange gases and absorb moisture. Roots typically grow underground. However, some plants also have adventitious roots that grow from the shoot above the ground.
  • Leaves: The primary sites for photosynthesis, the process through which plants create food, are leaves. Due to the presence of chlorophyll in the leaf cells, most leaves are typically green. However, additional plant pigments that cover up the green chlorophyll may cause some leaves to have distinct colors.

FAQs on Organ and Organ System

Question 1: What is an organ referred to as in anatomy?


An organ is referred to as a viscus in anatomy. Viscera is the plural version of it.

Question 2: Do the body’s organ systems function independently?


No, There is a large amount of functional overlap amongst organ systems. To efficiently carry out the many bodily activities, they must cooperate in an integrated and coordinated way.

Question 3: How many vital organs in the human body can’t live without? 


Humans have five essential organs, and none of us could survive without the others. The brain, heart, lungs, liver, and kidneys are among these organs. Then, these organs are divided into several organ systems.

Question 4: Which seven organs can you survive without?


Some of the “non-vital organs” are listed below. 

  • Spleen. This organ is located under the ribs on the left side of the abdomen. 
  • Stomach, reproductive organs, colon, gallbladder, appendix, kidneys, and reproductive organs.

Question 5: How do the three organ systems work together?


Body’s cells receive oxygen, water, and nutrients through your circulatory system. Your skin, excretory system, and respiratory system all function to remove wastes from your cells. Your nervous system uses electrical impulses to regulate all of these processes.

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Last Updated : 18 Oct, 2022
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