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

17. The Blood

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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

Which of the following would increase resistance to blood flow?

Decreased blood viscosity

Decreased cardiac output

Increased blood vessel diameter

Increased blood vessel length

Previous problemNext problem

Verified step by step guidance

Understand the concept of resistance to blood flow, which is influenced by factors such as blood viscosity, vessel length, and vessel diameter.

Recall that blood viscosity refers to the thickness of the blood. Decreased blood viscosity would reduce resistance, as thinner blood flows more easily.

Consider cardiac output, which is the volume of blood the heart pumps per minute. Decreased cardiac output does not directly increase resistance; it affects the amount of blood flow rather than the resistance itself.

Examine the effect of blood vessel diameter. Increased diameter decreases resistance because a wider vessel allows blood to flow more freely.

Recognize that increased blood vessel length increases resistance because the blood has to travel a longer distance, encountering more friction along the vessel walls.