Anatomy Body Cavities & Membranes

bestep's version from 2012-01-08 03:52

Section 1

Question Answer
The body has two large cavities called the DORSAL and VENTRAL CAVIITIES
Dorsal Body CavitySubdivided into two subdivisions; the cranial cavity which lies in the skull and encases the brain, and the vertebral cavity, which runs through the vertebral column to enclose the spinal cord.The hard, bony walls of this cavity protect the contained organs.
Ventral Body CavityHouses the interal organs( aka viscera) such as the lungs, heart intestines and kidneys
Ventral Body has two main subdivisions (Thoracic and Abdominopelvic)Thoracic cavity, which is surrounded by the ribs and muscles of the chest wall; and an inferior Abdominopelvic Cavity, which is surrounded by ab walls and pelvic girdle.
The thoractic and abdominal cavities are separated from each otherSeparated by the diaphram, which is a dome shaped muscle used in breathing.
Thoracic CavityIs subdivided into 3 subdivisions
3 subdivisions of the Thoracic Cavity are:Pieural cavities, the Mediastinum, which are both lateral and the Pericardial Cavity
Pieural CavityEach houses a lung
MediastinumContains the pericardial cavity, and surrounds the remaining throacic organs; central band of organs and contains the heart surrounded by the pericardial cavity.
Pericardial CavityEncloses the heart and other organs such as the esophagus and windpipe (trachea)
What separates the abdominopelvic cavity from the superior thoracic cavity?Dome Shaped-Diaphram
Abdominal CavityContains the stomach, intestines, spleen,liver, kidneys and other organs;
Pelvic CavityLies within the pelvis and Contains the bladder, some reproductive organs and the rectum.
Abdominopelvic Cavity is divided into 2 parts: The superior part (abdominal cavity) and the inferior part (Pelvic Cavity)
Peritoneal CavityMany organs in the abdominopelvic cavity surround this
SEROUS CAVITIESA slit like space lined by a serous membrane or serosa
The pleural cavity around the lung along with:the pericardial cavity around the HEART, the peritoneal cavity around the viscerain the abdominopelvic cavity
Parietal serosa membraneforms the outer wall of the cavity; Covers the body walls.
Visceral serosa membraneCovers the visceral organs or interal organs
Serous Cavities do NOT cotain AIRThey contain a thin layer of serous fluid which is secreted by both serous membranes
Serious fluidSeparates the serosae and allows the visceral organs to slide with little friction across the cavity walls as they carry out their routine functions. This freedom of movement is important for organs that move or change shape such as the heart pumping and a churning stomach.

Section 2

Question Answer
Abdominopelvic cavityIs very large and contains many organs and divided into smaller areas of the abdomen for study into 9 REGIONS
9 Regions if the Abdomenthe right and left hypochondiac regions, the epigastric region, the right and left lumbar regions, the umbillical region, the right and left iliac regions, hypogastric region
Right hypochondriac RegionLiver, gallbladder
Left hypochondriac RegionDiaphram
Epigastric RegiondStomach
Right Lumbar RegionAscending colon of the large intestine
Left Lumbar RegionDescending colon of the large intestine
Umbilical RegionSmall Intestine, transverse colon of the large intestine
Right Iliac (Inguinal) RegionCecum, appendix
Left Iiliac (Inguinal) RegionInitial part of the sigmoid colon
Hypogastric (pubic) RegionUrinary bladder
FOUR ABDOMINOPELVIC QUADRANTS DIVIDING THE ABDOMENOne vertical and one horizontal plane through the navel (drawn)
4 abdominopelvic quadrant names:Right upper (RUQ), left upper (LUQ), right lower (RLQ), left lower (LLQ) quadrant

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