Khan Academy
Khan Academy: Calculate Your Own Osmolarity
Learn how to use three lab values (Sodium, glucose, and BUN) to approximate your plasma osmolarity.
McGraw Hill
Mc Graw Hill: Circulation
An extensive page on the circulatory system in general. Scroll down to section 49.3 and you will find a simple comparison of the reptilian system to the other vertebrae systems.
Science Museum of Minnesota
Lesson Plan: Go With the Flow
In this effective site, students will name the parts of the heart and trace the flow of blood through the body. Contains related links.
Science Museum of Minnesota
Habits of the Heart: Lessons: Blood Circulation
Teacher directed instructional activity where students dramatize the flow of blood through the heart.
ICT Games
Ict Games: The Body
In this module students can learn intracate details regarding the four major body systems.
Other
Look d.com: Fish Circulation
This site from LookD.com provides information about bony fish circulation systems. The article is very brief, only one paragraph in length, but worth checking out on the subject.
Other
Hillfield Strathallan College: Evolution of Mammalian Circulation
An overview of the evolution of modern mamallian circulation. This is a good site since it puts the circulation found in reptiles in perspective. Compares it to systems in fish and mammals.
Treehut
Suzy's World: Blood
Use this site to find out why your body needs blood with this quick fact sheet. You can also try an experiment with your pulse.
Treehut
Suzy's World: Heart
Find out why your heart beats and perform an experiment to see your pulse moving.
National Health Museum
Access Excellence: Study of the Heart and Circulation
A concise history of the study of the heart and its anatomy. Includes color pictures and details about the work of Galen, William Harvey, and others.
PBS
Pbs Teachers: Scientific American: The New Zoos: Doctor Fish
Investigate the evolution of the heart and circulatory system in mammals by studying the anatomy of hearts in other animals. Create models of the hearts of fish, amphibians and mammals.
Sophia Learning
Sophia: Organ Systems: Lesson 2
This lesson will introduce the 11 organ systems of the body, giving a brief overview of their function. It is 2 of 2 in the series titled "Organ Systems."
Sophia Learning
Sophia: Organ Systems: Lesson 1
This lesson will introduce the 11 organ systems of the body, giving a brief overview of their function. It is 1 of 2 in the series titled "Organ Systems."
Biology 4 kids
Biology4 Kids: Circulation Is the Key
Find out what the circulatory system is made up of, how it works, and what systems it interacts with.
Biology 4 kids
Biology4 Kids: Lymph System Cleaning Up the Fluids
Find out what the lymphatic system does, how it works with other systems, and the significance of keeping an eye on the lymph nodes.
What2Learn
What2 Learn: Heart and Circulation
Play this interactive hangman game to develop your vocabulary of terms dealing with the heart and circulatory system.
Ducksters
Ducksters: Kids Science Projects and Experiments: Pulse and Heartbeat
Kids learn by experimenting with science. Project about the heartbeat and pulse.
Science Bob Pflugfelder
Science Bob: Body Zone: The Heart
An introduction to the different regions of the heart, along with a description of the hearts function. A good overview site.
Curated OER
Kids Health: Tu Corazon Y Sistema Circulatorio
Read about how your heart works and learn about the different parts of the heart.
ClassFlow
Class Flow: Human Body Systems
[Free Registration/Login Required] This flipchart introduces students to some of the major organs of the human body. Visual aids provide focused information on the heart and circulatory system as well as the brain and the eye.
ClassFlow
Class Flow: Human Heart
[Free Registration/Login Required] This flipchart discusses the anatomy and function of the human heart.
CK-12 Foundation
Ck 12: Biology: Circulatory System
[Free Registration/Login may be required to access all resource tools.] Covers the pathways of the pulmonary and systemic circulations.
BBC
Bbc: Ks2 Bitesize: Science: Circulation
Background information review of key concepts about the circulatory system, including the heart and pulse. Tis site provides diagrams, activities, and quiz questions.
Other
A Look Inside: Human Body
Learn how our body works at this personal site from a fourth grade teacher. Colorful graphics and lots of fun facts.