A&P- body cavities and the membranes

serous membrane

a thin membrane lining the close cavities of the body, forms two layers , secretes fluid

-comparable to air in diagram

pareital layer

lines the internal surface of the organs, outer layer of serous membrane

visceral layer

covers external surface of organs

serous cavity

potential space between parietal and visceral layer, cavities lined with serous membrane

serous fluid

consistency of oil and serves as lubricant to prevent friction from organs rubbing against each other

dorsal body cavity aka posterior aspect

contains cavities that are completely encased in bone and are physically and developmentally different from the ventral cavity

the posterior aspect contains..

cranial cavity and vertebral canal

cranial cavity

aka endocranium

formed by cranial bones and contains brain

vertebral canal

formed by vertebral column and contains spinal cord

ventral cavity

thoracic cavity and abdominopelvic cavity

divided into subdivisions that do not encase organs to bone,

lined with serous membranes

thoracic cavity includes..

mediastinum, pleural cavity, pericardial cavity

Mediastinum

area between the lungs containing the heart, aorta, vena cava, esophagus, and trachea

pleural

lungs

pleural cavity

contains the lungs

thoracic diaphragm

- Major muscle of respiration

- Separates thoracic and abdominal cavities

- Dome shaped

-bulges into thorax

pericardal cavity

surrounds the heart

serous pericardium

thinner, more delicate membrane that forms a double layer around the heart

parietal paricardium

The outer wall of the pericardial sac.

Coats outside wall of the cavity.

layer of dense connective tissue and a thin serous layer.

visceral paricardium

membrane that covers the heart

abdominopelvic cavity

contains both the abdominal and pelvic cavities

abdominal cavity contains

stomach, spleen, liver, gallbladder, small intestine, most of large intestine

pelvic cavity contains

bladder, reproductive organs, rectum

peritoneum

a multilayered membrane that protects and holds the organs in place within the abdominal cavity

Paretial peritoneum

Lining of abdominal wall

visceral peritoneum

the inner layer of the peritoneum that surrounds the organs of the abdominal cavity

peritoneal cavity

space between the parietal and visceral peritoneum,

contains serous fluid for lubrication from friction of abdominal organs rubbing together