Biology is designed for multi-semester biology courses for science majors. It is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand. To meet the needs of today’s instructors and students, some content has been strategically condensed while maintaining the overall scope and coverage of traditional texts for this course. Instructors can customize the book, adapting it to the approach that works best in their classroom. Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand—and apply—key concepts.

By the end of this section, you will be able to:Describe the system of blood flow through the bodyDescribe how blood pressure is regulated

Revised images and multiple choice questions only. By the end of this section, you will be able to:Describe the system of blood flow through the bodyDescribe how blood pressure is regulated

By the end of this section, you will be able to:Describe the system of blood flow through the bodyDescribe how blood pressure is regulated

This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"A new study published in the journal Anesthesiology suggests that computer-assisted individualized hemodynamic management is a promising strategy to minimize hypotension during certain surgeries. Intraoperative hypotension is common but can increase the risk of postoperative complications. During surgery, individualized hemodynamic management can help mitigate hypotension and decrease such complications. In this strategy, clinicians use both intravenous fluids and vasopressors to maintain mean arterial pressure and blood volume near a patient’s personalized baseline. Despite its reported success, this approach requires constant monitoring and adjustment, which can be particularly challenging during complex and prolonged surgeries. Automated systems that can deliver either vasopressors or fluids have recently been developed, but a single closed-loop system that can deliver both with minimal clinician intervention isn’t yet available..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.

This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"Congenital heart defects (CHDs) are common, affecting 9 out of every 1000 babies born. CHDs are caused by various gene mutations that prevent the heart chambers and/or valves from forming properly. However, the precise mechanisms of chamber development and how they are dysregulated in fetuses with CHDs are unclear. To learn more, researchers recently investigated the molecular signals of heart development in a zebrafish animal model. They found that all heart cells expressed the gene sema3fb, which encodes the cell guidance cue Sema3fb. However, only ventricle-specified cells expressed the gene encoding this cue’s receptor, Plxna3, effectively restricting Sema3fb signaling to the ventricle. In zebrafish embryos with sema3fb mutations (ca305 and ca306), heart chamber development was impaired. Specifically, the atrium and ventricle were too small because the cells were shrunken, which caused the heart to pump less blood and fill with fluid..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.