body cavities

1. Genital system

2. Female reproductive system

3. Male reproductive system

5. Anatomic Planes and Position

6. Body Cavities
Figure 1.9a

7. Body Cavities
• Dorsal cavityDorsal cavity protects the nervous system,
and is divided into two subdivisions
–Cranial cavity is within the skull and
encases the brain
–Vertebral cavity runs within the vertebral
column and encases the spinal cord
• Ventral cavityVentral cavity houses the internal organs
(viscera), and is divided into two subdivisions:
- Thoracic, abdomanopelvic cavities

8. Body Cavities Figure 1.9b

9. Body Cavities
• Thoracic cavityThoracic cavity is subdivided into pleural
cavities, the mediastinum, and the
pericardial cavity
–Pleural cavities – each houses a lung
–Mediastinum – contains the pericardial
cavity, and surrounds the remaining
thoracic organs
–Pericardial cavity – encloses the heart

10. Body Cavities
• The abdominopelvic cavity is separatedThe abdominopelvic cavity is separated
from the superior thoracic cavity by thefrom the superior thoracic cavity by the
dome-shaped diaphragmdome-shaped diaphragm
• It is composed of two subdivisions
–Abdominal cavity – contains the
stomach, intestines, spleen, liver, and
other organs
–Pelvic cavity – lies within the pelvis and
contains the bladder, reproductive
organs, and rectum

11. Ventral Body Cavity Membranes
Figure 1.10a

12. Ventral Body Cavity Membranes
Figure 1.10b

13. Other Body Cavities
• Oral and digestiveOral and digestive – mouth and cavities
of the digestive organs
• NasalNasal –located within and posterior to the
nose
• OrbitalOrbital – house the eyes
• Middle earMiddle ear – contain bones (ossicles) that
transmit sound vibrations
• SynovialSynovial – joint cavities