What is the best definition of an organ

organ, in biology, a group of tissues in a living organism that have been adapted to perform a specific function. In higher animals, organs are grouped into organ systems; e.g., the esophagus, stomach, and liver are organs of the digestive system.

What is the best definition of an organ quizlet?

Organ. a body part (such as a heart or brain) made up of different tissues joined together to perform a specific function. Organism.

What is the meaning of organ with examples?

noun. A distinct part of an organism that performs one or more specialized functions. Examples of organs are the eyes, ears, lungs, and heart of an animal, and the roots, stems, and leaves of a plant. A largest part of an organism, composed of tissues that perform similar functions.

What is the definition of an organ quizlet?

Define: organ. is a structure composed of two or more tissue types that performs a specific function for the body.

What is an organ system simple definition?

An organ system is a group of organs that work together to perform a complex function. There are 11 organ systems in the human body. All of these are required for survival, either of the person or of the species.

Which description is the best definition of a stem cell?

Which description is the best definition of a stem cell? An undifferentiated cell that can replicate itself indefinitely and differentiate into specialized cell types when appropriate.

What is organs in the body?

Organs are the body’s recognizable structures (for example, the heart, lungs, liver, eyes, and stomach) that perform specific functions. An organ is made of several types of tissue and therefore several types of cells. Human cells vary in size, but all are quite small.

What is the definition of a tissue quizlet?

tissue. a group of biological cells that perform a similar function.

What does organ mean in biology?

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.

Why is the liver considered to be an organ?

The liver is the largest solid organ in the body. It removes toxins from the body’s blood supply, maintains healthy blood sugar levels, regulates blood clotting, and performs hundreds of other vital functions.

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What is called an organ?

An organ is a self-contained group of tissues that performs a specific function in the body. The heart, liver, and stomach are examples of organs in humans. The word organ comes from the Latin organum, which means “instrument”.

What is an organ class 8?

An organ is a collection of different tissues which can work together to perform a particular function in the body of an organism. The different tissue combine together to form organs. These organs perform different tasks for the animals or the plants.

What is an organ for Class 3?

A group of organs working together known as an organ system, do one major work for the body. An Organ System consists of a group of organs that work together to do the same work. These organ systems work together in our body for it to function properly.

What is an organ system class 5?

Grade 5 students study the human body, focusing on five major organ systems – the respiratory, circulatory, digestive, excretory, and nervous sytems. … In studying the structure of organs, students will learn that all living tissues are composed of different kinds of cells.

What is organ system of school?

In this activity, students will work in small groups to become experts on the organ system assigned to them. They will then use creative methods to share their knowledge with the rest of the class. Organ systems are groups of organs that work together to do a job for the body they live in.

What is organ and organ system?

An organ is a group of tissues that work together for the overall function of the organ, and an organ system is a group of organs that work together to perform a specific function. The human organism consists of eleven organ systems.

Is blood an organ?

This chapter reveals that blood, which constitutes approximately 8% of human body weight, is one of the largest organs and the main means of transport for the exchange of substances between the organs. Blood plays an important role in the defense and repair processes of the body.

What is the most important organ in the body?

Anatomy & Function The brain is arguably the most important organ in the human body. It controls and coordinates actions and reactions, allows us to think and feel, and enables us to have memories and feelings—all the things that make us human.

What is the largest organ in the body?

The skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system.

What is the definition of stem cell in biology?

Stem cells are a specific type of cell capable of evolving into many different types of specialized cells within the body. … Due to their ability to repair, regenerate, and develop into certain specialized cell types, stem cells offer great promise as therapy for a number of diseases.

What does it mean for a cell to differentiate?

Cell differentiation is the process by which dividing cells change their functional or phenotypical type. All cells presumably derive from stem cells and obtain their functions as they mature.

What is bone marrow?

(bone MAYR-oh) The soft, spongy tissue that has many blood vessels and is found in the center of most bones. There are two types of bone marrow: red and yellow. Red bone marrow contains blood stem cells that can become red blood cells, white blood cells, or platelets.

What is an organ for Class 2?

organs are brain, heart, lungs, stomach, etc. movement and shape to our body.

Why are organs called organs?

Its earliest predecessors were built in ancient Greece in the 3rd century BC. The word organ is derived from the Ancient Greek ὄργανον (órganon), a generic term for an instrument or a tool, via the Latin organum, an instrument similar to a portative organ used in ancient Roman circus games.

What is epithelium?

The term “epithelium” refers to layers of cells that line hollow organs and glands. It is also those cells that make up the outer surface of the body.

What can a tissue be defined as?

Tissue is a group of cells that have similar structure and that function together as a unit. A nonliving material, called the intercellular matrix, fills the spaces between the cells. … There are four main tissue types in the body: epithelial, connective, muscle, and nervous. Each is designed for specific functions.

What are tissues?

In biology, tissue is a biological organizational level between cells and a complete organ. A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.

Can you live without a liver?

The liver performs essential, life-sustaining functions. While you can’t live without a liver completely, you can live with only part of one. Many people can function well with just under half of their liver. Your liver can also grow back to full size within a matter of months.

Is the largest gland in the body?

liver, the largest gland in the body, a spongy mass of wedge-shaped lobes that has many metabolic and secretory functions.

What is the mean of liver?

1a : a large very vascular glandular organ of vertebrates that secretes bile and causes important changes in many of the substances contained in the blood (as by converting sugars into glycogen which it stores up until required and by forming urea)

Is Bone an organ?

Bone is a mechanically optimized organ system whose composition and organization reflect the functional demands made upon it. Far from being an inert substance, it is also a living tissue that serves several important functions in the organism.