1. Body Cavities

2. Cranial cavity – holds the brain Spinal cavity – holds the spinal cord
Body Cavities
The organs of your body are mostly found in 4 cavities or spaces.
Cranial cavity – holds the brain
Spinal cavity – holds the spinal cord
Since both of these are found on the posterior portion of your body, they make up the Dorsal Cavity.

3. Cranial cavity
Spinal cavity

4. Specific Head Cavities
The anterior portion of the skull has some smaller cavities: Orbital cavity – holds the eyeball and eye muscles Nasal cavity – forms part of your nose and sinuses Buccal cavity – holds your teeth and tongue

5. 1. Thoracic cavity – located above the
Torso Cavities
The anterior portion of the body or Ventral Cavity is divided into 2 cavities as well:
1. Thoracic cavity – located above the
diaphragm; holds your lungs and heart
This area is subdivided into:
a left and a right pleural cavity.
a mediastinum a central area.

6. Right Pleural Cavity
Left Pleural Cavity
Mediastinum

7. 2. Abdominopelvic cavity – located below
the diaphragm down to the bottom of the trunk.
This area is subdivided into:
1. the abdominal cavity –the area below the
diaphragm to the top of the hip bones.
Organs: stomach, liver, most of the intestines,
pancreas, spleen, and kidneys.
2. the pelvic cavity –the area from the crest of the
hip bones down to the pelvic floor.
Organs: portions of the intestines, reproductive
structures, urinary bladder.

8. Thoracic cavity Abdominopelvic cavity Diaphragm Abdominal cavity

9. Abdominopelvic Quadrants (4)
The abdomen is often divided into 4 regions.
A horizontal line and a vertical line passing through the umbilicus divide the abdomen into:
Right upper quadrant
Left upper quadrant
Right lower quadrant
Left lower quadrant

11. Abdominal Regions (9)
For the convenience of locating abdominal organs, the area is divided like a tic-tac-toe grid.
Identified from right to left and from top to bottom, the regions are:
Right hypochondriac, epigastric, left hypochondriac
Right lumbar, umbilical, left lumbar
Right iliac (inguinal), hypogastric, left iliac (inguinal)