BiologyWise
Biology Wise: Circulatory System of a Rat
Describes the parts of a rat's circulatory system and how the blood circulates in a rat.
BiologyWise
Biology Wise: How the Circulatory System of a Pig Works
Describes the parts of a pig's circulatory system and how its blood circulates. Circulation in a pig fetus is also described as it has differences.
The Franklin Institute
Franklin Institute Online: Your Living Blood: It's Alive!
How does blood supply your body with the nourishment it needs? This site focuses on systemic circulation. Learn more about this fascinating part of your body when you check out this resource.
Curated OER
Kids Health: Tu Corazon Y Sistema Circulatorio
Read about how your heart works and learn about the different parts of the heart.
BiologyWise
Biology Wise: A Detailed Description of the Anatomy of Spiders
Describes anatomical features of a spider, including its external structure, eyes, mouth parts, digestive system, circulatory system, respiratory system, nervous system, reproductive system, and its spinnerets.
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.