Organs

Organs are specialized structures within the body that perform specific functions. They are composed of different tissues that work together to carry out the organ's specific role in maintaining the body's overall health and function.

Types of Organs

There are several types of organs in the human body, each with its own unique function:

Vital organs: These are essential for survival and include the heart, lungs, liver, and brain.
Accessory organs: These organs support the function of vital organs and include the pancreas, gallbladder, and spleen.
Specialized organs: These organs have specific functions, such as the stomach for digestion, the kidneys for filtering waste products, and the skin for protection.

Organ Systems

Organs are grouped together into organ systems, each of which has a specific function in the body. The main organ systems include the:

Respiratory system: Includes the lungs and airways for breathing.
Circulatory system: Comprised of the heart, blood vessels, and blood for transporting nutrients and oxygen throughout the body.
Digestive system: Involves the stomach, intestines, and liver for breaking down and absorbing nutrients from food.
Nervous system: Includes the brain, spinal cord, and nerves for transmitting signals and controlling bodily functions.
Urinary system: Comprised of the kidneys, bladder, and ureters for filtering waste and regulating fluid balance.
Reproductive system: Involves the reproductive organs for sexual reproduction and production of offspring.

Study Guide

Here are some key points to remember about organs:

What is an organ?
What are the different types of organs?
How are organs grouped in the body?
What are some examples of vital organs?
How do organ systems work together to maintain overall health?
Why are specialized organs important for specific bodily functions?

Understanding the role of organs and organ systems in the body is essential for comprehending human anatomy and physiology.

◂Science Worksheets and Study Guides Second Grade. What is science?

Vocabulary/Answer key

What is science?

The resources above cover the following skills:

LIFE SCIENCE

Ecosystems: Interactions, Energy, and Dynamics

Obtain information from literature and other media to illustrate that there are many different kinds of living things and that they exist in different places on land and in water (e.g., woodland, tundra, desert, rainforest, ocean, river).

EARTH AND SPACE SCIENCE

Earth’s Systems

Make observations from media to obtain information about Earth’s events that happen over a short period of time (e.g., tornados, volcanic explosions, earthquakes) or over a time period longer than one can observe (e.g., erosion of rocks, melting of glaciers).

Collect and evaluate data to identify water found on Earth and determine whether it is a solid or a liquid (e.g., glaciers as solid forms of water; oceans, lakes, rivers, streams as liquid forms of water).