ANATOMY LECTURE #4 Body Cavities and Regions

BODY REGIONS Appendicular=upper and lower limbs. Axial=head, neck, and trunk.

BODY CAVITIES Cranial Cavity: houses the brain Vertebral Cavity: contains the spinal cord, surrounded by backbone

BODY CAVITIES Thoracic cavity: chest area Abdominopelvic cavity: stomach area *Organs in these cavities are called viscera*

BODY CAVITIES The thoracic and abdominopelvic cavities are separated by the diaphragm-a muscle used during breathing.

BODY CAVITIES Thoracic cavity houses the lungs. In between the lungs is an area called the mediastinum (houses the heart, trachea, and thymus).

BODY CAVITIES The abdominopelvic cavity can be separated into the abdominal cavity and the pelvic cavity. Abdominal cavity includes the stomach, liver, spleen. Gallbladder, and the small and large intestines. Pelvic cavity is enclosed by the pelvic bones and houses the urinary bladder and internal reproductive organs.

BODY CAVITIES Body cavities within the head include: Orbital cavity: eyes Oral cavity: mouth, teeth, tongue. Middle ear cavity: contains the middle ear bones. Nasal cavity: sinuses

MEMBRANES Serous membrane: line the walls of the thoracic and abdominal cavities. Pericardial membrane: lines the heart. Peritoneal membrane: membranes in the abdominopelvic cavity.

BODY REGIONS Look on page 23 in the book and copy down the two sets of body regions in your notes.