Mr. Ford's Video - Chap 1: Body Cavities Flashcards
Ventral Body Cavity
- Thoracic cavity - holds heart & lungs
- Abdominopelvic cavity
* pelvic cavity (large intestine & repro organs)
* abdominal cavity (stomach, small intestine)
Dorsal Cavity
- Cranial cavity - brain
- Vertebral cavity - spinal cord
Body Cavities
- spaces within the body that help to protect, separate, and support internal organs
Cranial Cavity
- formed by the cranial bones
- contains the brain
Vertebral (spinal) Canal
- formed by the bones of the vertebral column
- contains the spinal cord
Meninges
- 3 layers of protective tissue that line the cranial cavity and vertebral canal.
Trunk
- diaphragm
- upper thoracic cavity
- lower thoracic cavity
Thoracic Cavity
- two pleural cavities
- the mediastinum (includes the pericardial cavity)
Pleural Cavities
- enclose the lungs
Pericardial Cavity
- surrounds the heart
Mediastinum
- central part of the thoracic cavity
- broad membrane portion between the lungs that extends from the sternum to the vertebral column
- contains all contents of the thoracic cavity except the lungs
Abdominopelvic Cavity
- extends from the diaphragm to the groin
- encircled by the abdominal muscular wall and the bones and muscles of the pelvis.
- divided into the superior abdominal and inferior pelvic cavity
Diaphragm
-a dome-shaped muscle that separates the thoracic cavity from the abdominopelvic cavity.
Superior Abdominal Cavity
- contains the stomach, spleen, liver, gallbladder, small intestine, and most of the large intestine.
Inferior Pelvic Cavity
- contains the urinary bladder, portions of the large intestine, and internal organs of the reproductive system.
Viscera
- organs inside the thoracic and abdominopelvic cavities
Serous membrane
- slippery, double-layered membrane associated with body cavities that do not open directly to the exterior
- covers the viscera within the thoracic and abdominal cavities and also lines the walls of the thorax and abdomen
Parts of a serous membrane
- parietal layer (pa-RĪ-e-tal),
- visceral layer (VIS-er-al),
Parietal layer
- a thin epithelium that lines the walls of the cavities
Visceral layer
-a thin epithelium that covers and adheres to the viscera within the cavities.
Serous fluid
- small amount of lubricating fluid
- between the potential space of the parietal & visceral layers
pleural cavities
- two fluid-filled spaces, one around each lung
pericardial cavity
- a fluid-filled space that surrounds the heart
membrane
- is a thin, pliable tissue that covers, lines, partitions, or connects structures.
pericardium
- serous membrane of the pericardial cavity
pleura
- serous membrane of the pleural cavities
- visceral pleura clings to the surface of the lungs
- parietal pleura lines the chest wall, covering the superior surface of the diaphragm
peritoneum
- serous membrane of the abdominal cavity
- peritoneum covers the abdominal viscera
- parietal peritoneum lines the abdominal wall, covering the inferior surface of the diaphragm.
peritoneal cavity
- between the pleura and the peritoneum
- contains a small amount of lubricating serous fluid
