Do Now Take out your notebook and turn to the warm up section. Write today’s date. Take out your notebook and turn to the warm up section. Write today’s date. Think about your body or find a picture of a body around the room. Today, we are going to look at body cavities. There are Two primary body cavities. How would you divide the body into only two cavities? What would they be? Think about your body or find a picture of a body around the room. Today, we are going to look at body cavities. There are Two primary body cavities. How would you divide the body into only two cavities? What would they be?

Today’s Objectives Students will know and be able to Students will know and be able to 1. Describe the principal body cavities and the organs they contain 2. Explain why the abdominopelvic cavity is divided into regions and quadrants

Body Cavities Spaces within the body that 1. contain, 2. protect, 3. separate, and 4. support internal organs

Dorsal (posterior) Body Cavity Located near the back: Located near the back: 1. Cranial cavity: formed by cranial bones, contains the brain 2. Vertebral (spinal) canal: formed by bones of vertebral column and contains spinal cord

Ventral (anterior) Body Cavity Located on the ventral aspect of the body and contains organs collectively called viscera. Located on the ventral aspect of the body and contains organs collectively called viscera. 1. Thoracic Cavity: chest cavity 1. Pericardial cavity: fluid-filled space that surrounds the heart 2. Two pleural cavities: each surround one lung 3. Mediastinum: mass of tissues located between the pleural cavities and extends from the sternum to the vertebral column, and from the neck to the diaphragm. 1. Contains all thoracic viscera except the lungs themselves 2. Abdominopelvic cavity 1. Abdominal cavity: stomach, spleen, liver, gallbladder, small intestine, most of large intestine 2. Pelvic cavity: bladder, portions of large intestine, internal organs of reproductive system The diaphragm divides the two The diaphragm divides the two

Checkpoint #1 1. What landmark separates the two primary body cavities from one another? 2. What is the difference between the cranial cavity and the vertebral canal?

Abdominopelvic Regions and Quadrants Nine abdominopelvic regions Nine abdominopelvic regions 1. Right Hypochondriac Region 2. Epigastric Region 3. Left Hypochondriac Region 4. Right lumbar Region 5. Umbilical Region 6. Left Lumbar Region 7. Right Iliac Region 8. Hypogastric Region 9. Left Iliac Region

Quadrants of the Abdominopelvic Cavity 1. Right Upper Quadrant (RUQ) 2. Left Upper Quadrant (LUQ) 3. Right Lower Quadrant (RLQ) 4. Left Lower Quadrant (LLQ)

Checkpoint #2 Locate the nine abdominopelvic regions and the four abdominopelvic quadrants on yourself, an list some of the organs found in each Locate the nine abdominopelvic regions and the four abdominopelvic quadrants on yourself, an list some of the organs found in each

Closure Open your notebook to the closure section and write today’s date. Open your notebook to the closure section and write today’s date. Why is it useful and important to have cavities, regions, and quadrants of the body? Why is it useful and important to have cavities, regions, and quadrants of the body?