Table of contents

1. Introduction to Anatomy & Physiology5h 40m
2. Cell Chemistry & Cell Components12h 37m
3. Energy & Cell Processes10h 7m
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 Blood1h 22m
18. The Heart1h 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 Balance Coming soon
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity Coming soon

3. Energy & Cell Processes

Introduction to Cell Division

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to Cell Division

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Importance of Cell Division

Jason Amores Sumpter

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So now that we've introduced the 3 main types of cell division, binary fission, mitosis, and meiosis, in this video we're going to talk about the importance of cell division. Cell division is an important process for reproduction, making more life, fetal development, growth, and allowing a single cell zygote to grow into a baby and allowing the baby to grow into a fully mature adult through the process of cell division. Moreover, cell division is crucial for tissue repair. If you get a cut, that tissue dies, and the dead tissue needs to be replaced; those replacement cells come from the process of cell division.

Here on the left-hand side, we're showing you an image of asexual reproduction, illustrating how a single cell can divide to create 2 cells. You can see the cell here is in the process of dividing. Some cells rely on cell division for reproduction purposes since many organisms are single-celled, and the only way that they can reproduce is through cell division. Also, fetus development critically relies on cell division, allowing a single-celled zygote to grow into a fetus and develop into a baby, and then grow into a toddler and onward until a fully mature adult is formed. This demonstrates the significant role cell division plays in fetal development.

In this image, it shows a single-celled zygote and how it can divide to form 2 cells, and then each of those can divide to form 4 cells, and so on until there are trillions of cells allowing for the fetus to develop. Once again, cell division is crucial for tissue repair and renewal, demonstrating some cells dividing to help repair a specific tissue. The main takeaway here is that cell division is immensely important.

But again, when a single cell divides to create 2 cells, each of those cells needs to have a copy of the DNA. This means that before a cell can divide, it must first replicate, duplicate, or make an extra copy of the DNA so that each of the daughter cells resulting can have their own copy of the DNA. The organization of the DNA is a very important component to understanding cell division and how it functions. Moving forward in our course, we're going to start to talk about the organization of DNA inside of the cell. So, I'll see you all in our next video.