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Ch 28: Circulatory System & Other Systems: Help & Review

About This Chapter

The Circulatory, Respiratory, Digestive, Excretory and Musculoskeletal Systems chapter of this High School Biology Help and Review course is the simplest way to master these human body systems. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn about the circulatory, respiratory, digestive, excretory and musculoskeletal systems.

Who's it for?

Anyone who needs help learning or mastering high school biology material will benefit from taking this course. There is no faster or easier way to learn biology. Among those who would benefit are:

  • Students who have fallen behind in understanding the circulatory, respiratory, digestive, excretory and musculoskeletal systems
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning science (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about the circulatory, respiratory, digestive, excretory and musculoskeletal systems
  • Students who struggle to understand their teachers
  • Students who attend schools without extra science learning resources

How it works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the circulatory, respiratory, digestive, excretory and musculoskeletal systems chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the circulatory, respiratory, digestive, excretory and musculoskeletal systems chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any question about the circulatory, respiratory, digestive, excretory and musculoskeletal systems. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

This chapter helps students review the concepts in a circulatory, respiratory, digestive, excretory and musculoskeletal systems unit of a standard high school biology course. Topics covered include:

  • Connective tissue
  • The different types of circulatory systems
  • Gastrointestinal tracts in humans
  • The human heart and circulatory system
  • The human muscular and skeletal systems
  • The human respiratory system and gas exchange

16 Lessons in Chapter 28: Circulatory System & Other Systems: Help & Review
Multicellular Organisms, Tissues and Epithelium

1. Multicellular Organisms, Tissues and Epithelium

In this lesson on multicellular organisms, you'll take a look at what it actually means to be multicellular and how cells are organized into tissues, organs, and organ systems. This lesson also covers one of the four main tissue types: epithelial tissue.

Types of Connective Tissue

2. Types of Connective Tissue

In this lesson, you'll learn about the various types of connective tissues in the body. These tissues include bone, fat, cartilage and blood. They form the framework of the body, support organs and much, much more!

Skeletal System and Muscular System

3. Skeletal System and Muscular System

Do you know how many bones are in the human body? Check out this video lesson to uncover the answer, as well as understand the role and importance of the skeletal and muscular systems.

Circulatory System I: Types of Circulatory Systems

4. Circulatory System I: Types of Circulatory Systems

From cnidarians to humans, all animals need a circulatory system to absorb nutrients and get rid of waste. Find out why different kinds of animals have different systems, and see what a closed circulatory system and indoor plumbing have in common.

Circulatory System II: The Human Vascular System

5. Circulatory System II: The Human Vascular System

In this lesson, learn all about the operation of the human vascular system. What are the different types of blood vessels? How does blood flow through the human body? How does the system adapt to your body changing?

Circulatory System III: The Heart

6. Circulatory System III: The Heart

What purpose does the heart serve? And how do different types of hearts function? In this lesson, you'll learn about two, three and four-chambered hearts.

Circulatory System IV: Red Blood Cells

7. Circulatory System IV: Red Blood Cells

Why don't mature red blood cells have nuclei or mitochondria, and how do these guys squeeze through capillaries? While learning about the brief but glorious lives of red blood cells, you'll also see which characteristics help them transport oxygen and carbon dioxide to other cells.

Circulatory System V: Hemoglobin

8. Circulatory System V: Hemoglobin

Did you ever wonder how red blood cells can store enough oxygen to supply the entire human body? Join us in this lesson on hemoglobin to learn why red blood cells are so good at transporting oxygen and carbon dioxide. This lesson will make you see red (as well as blue and purple-maroon)!

Gas Exchange in the Human Respiratory System

9. Gas Exchange in the Human Respiratory System

Did you know that the average human lung has a respiratory surface area that is roughly the same size as half of a tennis court? Believe it or not, that's how much surface area an active, healthy human needs to ensure that the body gets plenty of oxygen.

Digestive System I: The Upper Gastrointestinal Tract

10. 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.

Digestive System II: The Lower Gastrointestinal Tract

11. 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.

Excretory System

12. 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.

Complete vs. Incomplete Digestive Systems

13. Complete vs. Incomplete Digestive Systems

Here, we'll learn what a complete digestive system is, and how it is different from an incomplete digestive system. We will also look at examples of animals that have each type of digestive system.

The Octopus Circulatory System

14. The Octopus Circulatory System

The octopus is a unique underwater creature that evolved more than 600 million years ago. One of the most interesting things about the octopus is that is has 3 hearts! Read this lesson to learn more about its peculiar circulatory system.

The Roundworm's Digestive System

15. The Roundworm's Digestive System

Roundworms are a type of nematode with a relatively simple digestive system. In this lesson, we will take a more detailed look at roundworm digestion and see how it contrasts to other groups of worms.

External Carotid Artery: Anatomy & Branches

16. External Carotid Artery: Anatomy & Branches

In this lesson, we will explore the external carotid artery and learn what vessel it stems off of, what structures it feeds with life-giving blood, and how to identify a vampire bite to the external carotid artery versus the jugular vein.

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Other Chapters

Other chapters within the High School Biology: Help and Review course

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