Chapter 1.4 Precise Language of Anatomy Flashcards
Descriptions of any region or body part require an
Initial point of reference and the use of directional indicators
In the anatomic position
An individual stands upright with the feet parallel and flat on the floor. The head is level, and the eyes look forward toward the observer. The arms are at either side of the body with the palms facing forward and the thumbs pointing away from the body
By visualizing the body in anatomic position, all observers have common
Point of reference when describing and discussing its regions
Anatomists refer to real or imaginary “slices” of the body called
Sections or planes
The term section implies
An actual cut or slice to expose the internal anatomy
The word plane implies
An imaginary flat surface passing through the body
What are the three major anatomic planes through the body or individual organs are?
1) Coronal
2) Transverse
3) Midsagittal planes
Describe a coronal plane
Also called a frontal plane, it is a vertical plane that divides the body into anterior (front) and posterior (back) parts.
When a coronal plane is taken through the trunk, the anterior and the posterior portion contains what
The anterior portion contains the chest and the posterior portion contains the back
Describe a transverse plane
Also called a cross-sectional plane or horizontal plane, cuts perpendicularly along the long axis of the body or organ.
For a transverse plane the body or organ is separated into what
Both superior (upper) and inferior (lower) parts, and the relationship of neighboring organs at a particular level is revealed.
Computed tomography (CT) scans provide what type of anatomic plane
They provide transverse sectional images of the body for study
Describe a midsagittal plane
Or median plane, extends through the body or organ vertically and divides the structure into right and left halves
A plane that is parallel to the midsagittal plane, but either to the left or right, is termed what
A sagittal plane
A sagittal plane divides a structure into?
Right and left portions that may or may not be equal
How many numbers of midsagittal and sagittal planes are there?
There is only one midsagittal plane and an infinite number of sagittal planes
A midsagittal or sagittal plane is often used to show what
Internal body parts, especially in the head and thoracic organs
In addition to the 3 major planes (coronal, transverse, and midsagittal planes) there is a minor plane called
The oblique plane which passes through the specimen at an angle
Interpreting body sections has become important for who
Health-care professionals
To determine the shape of any object within a section, we must be able to
Reconstruct its three-dimensional shape by observing many continuous sections
Anterior means
In front of; toward the front surface
Give an example of anterior for the stomach and spinal cord
The stomach is anterior to the spinal cord
Posterior means
In back of; toward the back surface
Give an example of posterior for the heart and sternum
The heart is posterior to the sternum