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

1. Introduction to Anatomy & Physiology

Levels of Organization

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Levels of Organization

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Multiple Choice

During a cancer screening a doctor may choose to screen using histological or cytological methods. Cytological methods are often less invasive than histological methods. Why do you think this may be?

Histology usually requires intact tissue gathered from a biopsy or dissection, while cytology usually looks at individual cells which can be collected without greatly disturbing the entire tissue.

Histology often requires imaging of the whole body, while cytology requires an external exam of the body without any imaging tools.

Histology involves surgery so that whole organs can be examined, while cytology can be performed using genetic or molecular analysis of bodily fluids such as saliva or urine.

Histology requires removing and analyzing single cells from an intact tissue, while cytology can be performed using imaging techniques such as MRI and therefore does not require removing cells or tissue from the body.

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Verified step by step guidance

Understand the difference between histology and cytology: Histology involves the study of tissues, which often requires obtaining a sample of intact tissue through a biopsy or dissection. Cytology, on the other hand, focuses on the examination of individual cells, which can be collected with less invasive methods.

Consider the methods of sample collection: Histological methods typically require a more invasive procedure to obtain a tissue sample, such as a biopsy, which involves removing a small piece of tissue from the body. Cytological methods can often use samples from bodily fluids like saliva or urine, which are easier to collect.

Evaluate the level of invasiveness: Since histology requires intact tissue samples, it often involves surgical procedures or imaging techniques that can be more invasive. Cytology, however, can be performed with less disturbance to the body, as it may only require a simple collection of cells or fluids.

Analyze the scope of examination: Histology allows for the examination of the architecture and structure of tissues, which can provide detailed information about the presence and extent of disease. Cytology focuses on the cellular level, which can be sufficient for certain types of screenings and is less invasive.

Consider the technological requirements: Histological analysis may require advanced imaging tools and techniques to visualize the tissue structure, while cytological analysis can often be done with simpler methods, such as microscopy or molecular analysis, without the need for extensive imaging.