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:Explain the processes of digestion and absorptionCompare and contrast different types of digestive systemsExplain the specialized functions of the organs involved in processing food in the bodyDescribe the ways in which organs work together to digest food and absorb nutrients

Students are introduced to the respiratory system, the lungs and air. They learn about how the lungs and diaphragm work, how air pollution affects lungs and respiratory functions, some widespread respiratory problems, and how engineers help us stay healthy by designing machines and medicines that support respiratory health and function.

The digestive system is amazing: it takes the foods we eat and breaks them into smaller components that our body can use for energy, cell repair and growth. This lesson introduces students to the main parts of the digestive system and how they interact. In addition, students learn about some of the challenges astronauts face when trying to eat in outer space.

Moving down the digestive system we take a look at the throat. Specifically we examine the pharynx, and the esophagus. We also look at how we swallow, breaking it down into the two phases.

Lesson 3 in our Digestive System series. This is part of our Anatomy and Physiology lecture series.

If this video helps you please be sure to LST -like subscribe and tell your friends. Your support helps us make more videos. For the complete series please visit http://mrfordsclass.net/

Other Free Videos in the Digestive System series:
-Introduction to the Digestive System (18:01): http://youtu.be/V71Ao98KePI
-The Mouth (18:02): http://youtu.be/-LWqhNaQjvk
-The Throat (18:03): http://youtu.be/guXIwvrUGM4

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:

"Oropharyngeal dysphagia is characterized by difficulty swallowing and occurs in about 45% of stroke patients. Thickening agents are one effective way to help patients with dysphagia consume liquids and foods. However, few viscosity levels per study have been assessed, and the optimal levels for patients with oropharyngeal dysphagia have not yet been established. To address that gap, the Physiology Digestive team from the Hospital of Mataró recently tested Nutilis Clear®, a xanthan gum-based thickener, at 7 shear viscosity levels. They looked at the effects of viscosity on the safety, efficacy, and physiology of swallowing in patients with post-stroke oropharyngeal dysphagia. The researchers first provided patients a thin liquid, followed by thickened boluses, from the highest to the lowest. Each bolus was provided in duplicate..."

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

The oesophagus (or gullet) is a muscular tube which transports food from the pharynx to the stomach. A bolus of food is passed down the oesophagus by peristalsis. The oesophagus is divided into cervical, thoracic and abdominal sections.