Blood Vessels
Arteries: Arteries carry oxygenated blood away from the heart with thick, muscular walls and a smaller lumen.
Veins: Veins carry deoxygenated blood back to the heart with thinner walls, a larger lumen, and one-way valves.
Capillaries: Capillaries facilitate the exchange of substances between the blood and body tissues.
Functions of Blood Vessels:
- Transportation
- Regulation
- Exchange
Study Guide
- Describe the structure and function of arteries, veins, and capillaries.
- Explain the differences in the walls and lumens of arteries and veins.
- Discuss the importance of capillaries in the circulatory system.
- Explore the role of blood vessels in maintaining blood pressure and regulating blood flow.
◂Science Worksheets and Study Guides Eighth Grade. Volcanoes
Worksheet/Answer key
Volcanoes 
Worksheet/Answer key
Volcanoes Worksheet/Answer key
Volcanoes Vocabulary/Answer key
Volcanoes Vocabulary/Answer key
Volcanoes Vocabulary/Answer key
Volcanoes
Worksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Earth/Space Science: Students will use scientific skills and processes to explain the chemical and physical interactions (i.e., natural forces and cycles, transfer of energy) of the environment, Earth, and the universe that occur over time.
Earth History: Explain how sedimentary rock is formed periodically, embedding plant and animal remains and leaving a record of the sequence in which the plants and animals appeared and disappeared.
Explain how sedimentary rock buried deep enough may be reformed by pressure and heat and these reformed rock layers may be forced up again to become land surface and even mountains.