About This Chapter
How It Works:
- Identify the lessons in the ScienceFusion The Digestive & Excretory Systems chapter with which you need help.
- Find the corresponding video lessons with this companion course chapter.
- Watch fun videos that cover the digestive & excretory systems topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.
You'll learn all of the human anatomy topics covered in the textbook chapter, including:
- Parts and functions of the upper and lower GI tracts
- Anatomy of the mouth
- Functions of excretory system
- The urinary system
- Maintaining homeostasis
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1. Digestive System I: The Upper Gastrointestinal Tract
Did you know that there are digestive enzymes in your saliva? It's true. As soon as you put a piece of food in your mouth, the digestive process begins. Join us with this first of two lessons about the human digestive system, where we'll follow food through the upper gastrointestinal tract from the mouth through the stomach.
2. Digestive System II: The Lower Gastrointestinal Tract
The lower gastrointestinal tract is the part of the digestive system that is responsible for the last part of food digestion and the expulsion of waste from the body. In this lesson, we'll look at each part of the system and what functions each serves in the process of digestion.
3. Anatomy and Physiology of the Mouth
The digestive system is a long tube that breaks food down both mechanically and chemically. In this lesson, you will learn about the mouth and how it begins the digestive process - with the help of the teeth and the enzyme called salivary amylase.
4. Excretory System
Each year in the U.S., close to 400,000 people with kidney failure undergo dialysis treatment in order to remove waste, remove excess fluid and restore electrolyte balance. Kidneys, the workhorses of the excretory system, perform these same functions more effectively than any machine. In this lesson, we'll talk about how the excretory system removes toxic substances from the body.
5. Gross Anatomy of the Urinary System
Our body must detoxify and cleanse itself to thrive. That is why we depend so heavily on our liver and urinary system. In this lesson, we'll explore how toxins are filtered by our organs and how urine is formed and expelled with the nephron, bladder, ureters, and urethra.
6. How the Urinary System Maintains Homeostasis
Learn about how the urinary system maintains the human body by influencing blood composition and volume and understand how the kidneys are influenced by hormones.
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Other chapters within the ScienceFusion The Human Body: Online Textbook Help course
- ScienceFusion The Human Body Unit 1.1: Introduction to Body Systems
- ScienceFusion The Human Body Unit 1.2: The Skeletal & Muscular Systems
- ScienceFusion The Human Body Unit 1.3: The Circulatory & Respiratory Systems
- ScienceFusion The Human Body Unit 1.5: The Nervous & Endocrine Systems
- ScienceFusion The Human Body Unit 1.6: The Reproductive System
- ScienceFusion The Human Body Unit 2.1: The Immune System
- ScienceFusion The Human Body Unit 2.2: Infectious Disease
- ScienceFusion The Human Body Unit 2.3: Nutrition & Fitness