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Grades 6–10. All students are interested in their bodies and how they work. Exploring Respiration and Circulation gives students an opportunity to express what they already know about their bodies and extend their understanding by performing a series of engaging hands–on activities. This Student eGuide allows students and teachers 24/7 access to their STC–Secondary content. Access for 32 students per year for 60 months.

Grades 6–10. All students are interested in their bodies and how they work. Exploring Respiration and Circulation gives students an opportunity to express what they already know about their bodies and extend their understanding by performing a series of engaging hands–on activities. Exploring Respiration and Circulation is divided into 2 parts: The Respiratory System and The Circulatory System. In the first half of the unit, students learn that breathing is the mechanical process of moving air into and out of the lungs, while cellular respiration is a metabolic activity that uses oxygen and releases energy and carbon dioxide. As the unit proceeds, students discover that the circulatory system transports oxygen to the body's cells and carries away carbon dioxide. Students' classroom investigations, coupled with readings about health and medicine, help them recognize the roles of these two body systems in maintaining wellness.

STC–Secondary™ is a 16–unit, inquiry–centered middle school science curriculum developed by the Smithsonian Science Education Center (SSEC). Each STC–Secondary™ unit provides opportunities for students to experience scientific phenomena firsthand. A comprehensive, research–based curriculum, STC–Secondary™ is aligned with the Next Generation Science Standards*.

Designed to enhance the teaching of the Science and Technology Concepts Program in the classroom, the STC Student eGuide allows students and teachers 24/7 access to their STC–Secondary content. Access for 32 students per year for 60 months.

*Next Generation Science Standards® is a registered trademark of WestEd. Neither WestEd nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of this product, and do not endorse it.