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ATI TEAS 7 Science Course

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  1. Introduction
    Free ATI TEAS Science Diagnostic Test
    1
  2. Human Anatomy and Physiology
    General Anatomy and Physiology
    15m|
    3
    |
    1
  3. Respiratory System
    17m|
    4
    |
    1
  4. Cardiovascular System
    30m|
    9
    |
    1
  5. Gastrointestinal System
    8m|
    2
    |
    1
  6. Neuromuscular System
    43m|
    10
    |
    1
  7. Reproductive System
    8m|
    2
    |
    1
  8. Integumentary System
    11m|
    2
    |
    1
  9. Endocrine System
    11m|
    3
    |
    1
  10. Genitourinary System
    16m|
    4
    |
    1
  11. Immune System
    13m|
    4
    |
    1
  12. Skeletal System
    26m|
    6
    |
    1
  13. Life and Physical Sciences
    Describe Cell Structure, Function, and Organization
    3
  14. Describe the Relationship Between Genetic Material and the Structure of Proteins
    2
  15. Apply Concepts of Mendel's Laws of Inheritance
    1
  16. Describe the Structure and Function of the Basic Macromolecules in a Biological System
    1
  17. Describe the Role of Microorganisms in Disease
  18. Chemistry
    Recognize Basic Atomic Structure
    36m|
    10
    |
    1
  19. Explain Physical Properties and Changes of Matter
    11
    |
    1
  20. Describe Chemical Reactions
    1
  21. Understand Properties of Solutions
  22. Scientific Reasoning
    Use Basic Scientific Measurements and Measurement Tools
    1
  23. Apply Logic and Evidence to a Scientific Explanation
    1
  24. Predict Relationships Among Events, Objects, and Processes
    1
  25. Apply the Scientific Method to Interpret a Scientific Investigation
    1
  26. Timed Practice Test Simulations
    ATI TEAS Science Practice Tests
    5h 15m|
    5
Topic 2, Lesson 2
3m
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Levels of Organization and Divisions of the Abdomen

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Welcome to Lesson 2 on an Introduction to Anatomy and Physiology

Levels of Organization and Divisions of the Abdomen

Lesson Goals

By the end of this lesson you will be able to:Β 

1. Identify the levels of organization of the human body

2. Identify the 3 major anatomical planes

3. Identify the 4 quadrant and 9 region system for describing locations of anatomical structures

Vocabulary

Sagittal plane-plane running down the middle of the body and dividing the body into right and left sections

Coronal plane-plane dividing the body into anterior and posterior sections

Transverse plane-plane dividing the body into superior and inferior sections

Transpyloric plane-the superior transverse plane used in the 9 abdominal region system

Transtubercular plane-the inferior transverse plane used in 9 abdominal region system

Epigastric–term that means above the stomach

Hypochondriac-term used in the 9 abdominal regions to identify structures superior and lateral to the stomach

Lumbar-term meaning the region of the low back and also used in the 9 abdominal region system for describing the location of structures lateral to the umbilicus

Umbilicus-the naval which indicates the center of the abdomen

Iliac-term meaning the lower lateral abdominal regions

Inguinal-term sometimes used in the 9 abdominal regions indicating the lower lateral abdomen

Hypogastric-term meaning below the stomach

 

 

Levels of Organization

The body is organized according to levels of complexity. The lowest level of complexity is the atom. The highest level of complexity is the organism.Β 

Here are the levels from lowest to highest complexity:

  • Atom
  • Molecule
  • Cell
  • Organ
  • Organ System
  • Organism (human body)

Anatomical Planes

A plane is a 2 dimensional object that can divide the body into 2 sections.Β Anatomical planes are used for studying slices of the body. For example, magnetic resonance

imaging (MRI) can β€œslice” the body into sections to look for abnormalities.

The anatomical planes divide the body in various ways.

The sagittal plane divides the body into right and left sections.

The coronal plane divides the body into anterior and posterior sections and the transverse plane divides the body into superior and inferior sections.

Abdominal Divisions

Abdominal divisions are used to describe the locations of pain, injuries and abnormalities in the abdominal area.

There are essentially 2 ways to divide the abdomen which include the 4 quadrant method and the 9 abdominal regions method.

For the 4 quadrant method, a sagittal and transverse plane intersect at the umbilicus. The quadrants are the right and left upper quadrants and right and left lower quadrants.

It is good to know some of the organs in each quadrant. For example, the gallbladder is in the right upper quadrant, the appendix in the right lower quadrant and the spleen is in the left upper quadrant.

The 9 abdominal regions are a bit more complex.

Four planes are needed to divide the abdomen into 9 equal sections. There are 2 parasagittal planes (sometimes called lateral lines) and 2 transverse planes. The superior transverse plane is called the transpyloric plane and the inferior plane is called the transtubercular plane. The center of the 9 regions is the umbilicus. The 3 superior regions are the epigastric and right and left hypochondriac. The middle regions are the umbilical and right and left lumbar.

The lower regions are the hypogastric and right and left iliac or inguinal.

Study the anatomical planes and abdominal divisions in the image below: