About This Chapter
How It Works:
- Identify the lessons in the Prentice Hall Biology Digestive and Excretory Systems chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the digestive and excretory systems topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, re-watch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn about:
- The dietary importance of water
- Carbohydrates, lipids and proteins
- The upper and lower gastrointestinal tracts
- The pancreas
- The gallbladder and liver
- The excretory system
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1. Water's Role as a Nutrient: Importance & Dietary Need
Water is an important thing for the entire world and the world inside your body. This lesson will point out why it's important for you and how much you need on a daily basis.
2. Structure and Function of Lipids
Molecules called lipids have long hydrocarbon chains that determine the way they act. They can be fats, oils, or hormones, and even exist in our cell membranes. Learn more about the chemical structure and biological function of various lipids in this lesson.
3. Primary Functions of Protein in the Body
Protein is a vital molecule that carries out many functions in your body. Learn how proteins provide structure, regulate body processes, transport materials throughout your body, help your immune system and act as a source of energy.
4. Structure and Function of Carbohydrates
Carbohydrates are found in many foods that we eat and may be found as sugars, starches, or fiber. Learn more about these three distinct types of carbohydrates, and how they are distinguished through their chemical structures in this lesson.
5. Minerals in Our Food: Functions in the Body & Food Sources
Minerals are important substances that help your body's form and function on many different levels. This lesson will go over some important ones, what they do, and where they are found in our diets.
6. Vitamins We Need: Their Importance & Sources
There are a lot of different vitamins, and they come from many different places! This lesson will teach you about what they are, how many different kinds you need, what they do, and where you can obtain them naturally.
7. 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.
8. 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.
9. What Is the Pancreas? - Function, Enzymes & Role in Digestion
Your pancreas plays an important role in the digestion of food. In this lesson, you will learn about the enzymes found in pancreatic juice that allow your body to break down carbohydrates, proteins and fats.
10. The Gallbladder & Liver: Function & Role in Digestion
Bile is produced by the liver and stored in the gallbladder. In this lesson, you will learn about bile and its role in the breakdown of dietary fats. You will also learn how the hormones secretin and cholecystokinin help regulate these organs.
11. 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.
12. The Kidney: Major Divisions & Structures
Learn about the major layers of the kidneys, like the renal cortex and renal medulla. Find out about the inner parts of the kidneys, including the renal papilla, renal pelvis, renal pyramid, and renal hilum.
13. Human Skin: Layers, Function & Structure
This lesson will cover the three main layers of your skin, which includes the epidermis, dermis, and subcutis. In addition, we'll learn about other skin cells and tissue, such as adipose tissue, keratinocytes, melanocytes, and Merkel's cells.
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Other chapters within the Prentice Hall Biology: Online Textbook Help course
- Prentice Hall Biology Chapter 1: The Science of Biology
- Prentice Hall Biology Chapter 2: The Chemistry of Life
- Prentice Hall Biology Chapter 3: The Biosphere
- Prentice Hall Biology Chapter 4: Ecosystems and Communities
- Prentice Hall Biology Chapter 5: Populations
- Prentice Hall Biology Chapter 6: Humans in the Biosphere
- Prentice Hall Biology Chapter 7: Cell Structure and Function
- Prentice Hall Biology Chapter 8: Photosynthesis
- Prentice Hall Biology Chapter 9: Cellular Respiration
- Prentice Hall Biology Chapter 10: Cell Growth and Division
- Prentice Hall Biology Chapter 11: Introduction to Genetics
- Prentice Hall Biology Chapter 12: DNA and RNA
- Prentice Hall Biology Chapter 13: Genetic Engineering
- Prentice Hall Biology Chapter 14: The Human Genome
- Prentice Hall Biology Chapter 15: Darwin's Theory of Evolution
- Prentice Hall Biology Chapter 16: Evolution of Populations
- Prentice Hall Biology Chapter 17: The History of Life
- Prentice Hall Biology Chapter 18: Classification
- Prentice Hall Biology Chapter 19: Bacteria and Viruses
- Prentice Hall Biology Chapter 20: Protists
- Prentice Hall Biology Chapter 21: Fungi
- Prentice Hall Biology Chapter 22: Plant Diversity
- Prentice Hall Biology Chapter 23: Roots, Stems, and Leaves
- Prentice Hall Biology Chapter 24: Reproduction of Seed Plants
- Prentice Hall Biology Chapter 25: Plant Responses and Adaptations
- Prentice Hall Biology Chapter 26: Sponges and Cnidarians
- Prentice Hall Biology Chapter 27: Worms and Mollusks
- Prentice Hall Biology Chapter 28: Arthropods and Echinoderms
- Prentice Hall Biology Chapter 29: Comparing Invertebrates
- Prentice Hall Biology Chapter 30: Nonvertebrate Chordates, Fishes, and Amphibians
- Prentice Hall Biology Chapter 31: Reptiles and Birds
- Prentice Hall Biology Chapter 32: Mammals
- Prentice Hall Biology Chapter 33: Comparing Chordates
- Prentice Hall Biology Chapter 34: Animal Behavior
- Prentice Hall Biology Chapter 35: Nervous System
- Prentice Hall Biology Chapter 36: Skeletal, Muscular, and Integumentary Systems
- Prentice Hall Biology Chapter 37: Circulatory and Respiratory Systems
- Prentice Hall Biology Chapter 39: Endocrine and Reproductive Systems
- Prentice Hall Biology Chapter 40: The Immune System and Disease