The anus is the terminal portion of the alimentary tract which communicates with the external environment. Two sphincters control it's aperture. It allows faeces and gas to leave the body. Defeacation is the process where faeces are expelled from the rectum through the anus.
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 process of digestionDetail the steps involved in digestion and absorptionDefine eliminationExplain the role of both the small and large intestines in absorption
Digestion process of carbohydrates is conversion of complex molecules are converted into simple sugars.Absorption takes place in small intestine by active and passive transport.Metabolism - Oxidation by Glycolysis
Different hormones, neurotransmitters and reflexes are involved in the complicated process of feeding in animals. Secretions and motility of the gastrointestinal tract are stimulated and carefully regulated by numerous factors, including environmental stimuli and the presence of food in different parts of the gastrointestinal tract from the oral cavity right through to the intestines. When a harmful substance is ingested the body acts to eliminate it in different ways to prevent the animal becoming ill, for example, through vomiting and diarrhoea. If one or more of the pathways in controlling feeding is damaged or inhibited, then problems such as obesity occurs.
To reinforce students' understanding of the human digestion process, the functions of several stomach and small intestine fluids are analyzed, and the concept of simulation is introduced through a short, introductory demonstration of how these fluids work. Students learn what simulation means and how it relates to the engineering process, particularly in biomedical engineering. The teacher demo requires vinegar, baking soda, water and aspirin.
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.
After studying the basics of enzyme function, students will be exposed to the history and evolution of lactose intolerance/lactase persistence. Both whole group and individual activities will ask students to interact with the concept. They will conduct a lab to understand the role of enzymes in lactose digestion and communicate their knowledge by creating a public health poster.
The Digestion and Nutrition Student Edition book is one of ten volumes making up the Human Biology curriculum, an interdisciplinary and inquiry-based approach to the study of life science.
The flexbook is divided into 13 chapters with sections and subsections. These are numbered in such a way that the first number represents the chapter. A period separates the chapter from the section number, and another period is followed by the subsection number. The figures are non-copyrighted figures or I have made them myself in PowerPoint. The flexbook also contains links to articles, videos, and animations in Web Link boxes. These can be clicked to open the link, and urls for these resources are also provided at the end of the section or subsection.
The Kansas State University Human Nutrition (FNDH 400) Flexbook is a textbook for students taking Kansas State University FNDH 400 course.FNDH 400 is a 3-hour, intermediate-level, human nutrition course at Kansas State University take primarily by sophomores and juniors because it has prerequisites of a college biology and chemistry courses.
This is a diagram visually summarizing the main stages of food processing: ingestion, digestion, absorption, and elimination. This diagram was created to accompany a chapter on digestion and nutrition modified from the OpenStax Anatomy and Physiology textbook for a nonmajor's biology course.
It was modified for biology instruction by Tina B. Jones from a public domain drawing posted to Wikimedia Commons by Tom Kelly, U.S. Fish and Wildlife Service.
A service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health (NIH)
The nitrogen cycle game helps you learn how nitrogen atoms move through various forms including soil, the atmosphere, plants and animals. Actions such as lightening, bacteria digestion, plant assimilation, plant death, animal death, herbivorism and nitrogen fixing plant bacteria move nitrogen from one form to another.
Students reinforce their knowledge of the different parts of the digestive system and explore the concept of simulation by developing a pill coating that can withstand the churning actions and acidic environment found in the stomach. Teams test the coating durability by using a clear soda to simulate stomach acid.