Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

7. The Skeletal System

The Thoracic Cage

Anatomy & Physiology

7. The Skeletal System

The Thoracic Cage

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

When giving chest compressions during CPR the thoracic cavity can flex in and out without breaking bones. What is one reason that the thoracic cage is able to flex in this manner?

Flexible costal cartilage comprises a large portion of the anterior thoracic cage.

Ribs have a curved shape allowing them to flex and bend easily.

The floating ribs have no connection to the sternum allowing the thoracic cage to change shape easily.

The sternum is made of three bones that can easily bend where they form joints with each other.

Previous problemNext problem

Verified step by step guidance

Understand the structure of the thoracic cage: The thoracic cage is composed of the sternum, ribs, and costal cartilages. It provides protection to the heart and lungs while allowing for respiratory movements.

Identify the role of costal cartilage: Costal cartilage connects the ribs to the sternum and is made of hyaline cartilage, which is flexible and allows for movement and expansion of the rib cage during breathing.

Consider the shape and structure of the ribs: The ribs are curved and somewhat elastic, which allows them to absorb impact and flex without breaking easily.

Examine the role of floating ribs: The last two pairs of ribs, known as floating ribs, do not attach to the sternum, providing additional flexibility to the thoracic cage.

Analyze the composition of the sternum: The sternum consists of three parts (manubrium, body, and xiphoid process) that are connected by joints, allowing for slight movement and flexibility during chest compressions.