Website
Merck Sharp & Dohme Corp.

Merck Manual: Biology of the Heart

For Students 9th - 10th
The Merck Manual describes the human heart and shows how the heart pumps blood. Includes interactive 3D models.
Website
Untamed Science

Untamed Science: Biology: Human Biology: Circulatory System

For Students 9th - 10th
Read and watch how the blood, the heart, and the blood vessels keep the blood flowing through our bodies. [6:00]
eBook
Biology Pages

Kimball's Biology Pages: Anatomy of the Human Circulatory System

For Students 9th - 10th
This site is produced by John W. Kimball, a retired biology teacher who wrote the textbook that these pages came from. The excerpt explains the different parts of the circulation system and how they function. Includes great pictures!
Activity
Other

Dr. Saul: Biology in Motion

For Students 9th - 10th
This interactive site provides animations and activities in several areas of physiology. The images are simple, but clear. The accompanying text provides a good description of the process being shown.
Unit Plan
CK-12 Foundation

Ck 12: Life Science: Blood Vessels

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] The blood vessels are an important part of the cardiovascular system. They connect the heart to every cell in the body. Arteries carry blood away from the heart,...