And below we room with component two that our rundown on the points you must learn prior to you dive into the meaty ingredient of A&P, specifically how to talk about the body. In our previous post, we debated anatomical position and also directional terms. In this post, we’re walk to take it a look at planes and also cavities.

You are watching: Which plane divides the body into equal right and left halves

Planes: due to the fact that who said anatomy didn’t need an imagination?

No, no the sort that fly you over oceans and also have advantageous people in uniforms that ply you through bags the stale peanuts. The various other kind! The arts kind, or in much more technical state the area of a two-dimensional surface. When supplied in conjunction with anatomy, planes are supplied to divide the body and its parts, which allows you to define the see from i beg your pardon you examine the body. If you look at her A&P textbook, you’ll most likely an alert that a great number that the pictures and diagrams manipulate planes.

Here is a perform of commonly used planes:

Frontal (Coronal) plane

Divides the body into anterior (front) and also posterior (back) portions

Transverse plane

Divides the body into superior (upper) and also inferior (lower) portions

Sagittal plane

Vertical aircraft that divides the body into right and also left sides.

Midsagittal plane

Divides the body at midline right into equal right and also left sides.

Oblique plane

Divides the human body at one angle.

Of course, in reality, the planes provided are completely imaginary, but they room a beneficial visual in terms of describing a view.

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Using a frontal airplane to bisect the body lengthwise, we’re able come describe certain areas that would not be easily visible or available if we used another plane.


The transverse plane bisects the brain horizontally, permitting for a exceptional view.

Cavities: due to the fact that things must be maintained somewhere.

A ide easier to grasp than planes and also directional is human body cavities, together they room a physics thing. When you hear the word “cavity,” no doubt friend think the the sort in your this that are led to by plaque. A cavity, in any capacity, is a hollow place. In your teeth, it’s a hollow little bit in the difficult body. In the body itself, that is a hollow place usually filled v organs, nerves, vessels, and muscles.

Here space the body’s cavities:

Cranial cavity

Formed by the cranial bones and holds the brain

Vertebral canal

Formed by the vertebrae and also contains the spinal cord

Thoracic cavity

Formed by the thoracic cage, muscles of the chest, sternum, and the thoracic vertebrae; contains the pleural, pericardial, and also mediastinum cavities

Pleural cavity

Fluid-filled spaces the surround both lungs

Pericardial cavity

Fluid-filled space that surrounds the heart; the serous membrane of the pericardial cavity is the pericardium


Central part of the thoracic cavity; has the heart, thymus, trachea, several major blood vessels, and esophagus

Abdominal cavity

Contains liver, stomach, spleen, little intestine, and most that the large intestine; the serous membrane of the abdominal cavity is the peritoneum

Pelvic cavity

Contains bladder, few of the huge intestine, and reproductive organs (internal)

The cranial cavity. Image from person Anatomy Atlas.

The thoracic cavity. Photo from person Anatomy Atlas.

The abdominal cavity. Image from person Anatomy Atlas.

The pelvic cavity. Picture from human being Anatomy Atlas.

This post was initially published in 2013. The has due to the fact that been update with new body cavity images from human being Anatomy Atlas 2019.

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