Gastrointetsinal System (anatomy) Flashcards
What organs are apart of the GI tract ?
Oesophagus
Liver
Stomach
Duodenum
Gallbladder
Pancreas
Jejunum
Ileum
Descending colon
Cecum
Appendix
Rectum
What’s the function of digestion ?
Gastric acid
Bile
Pancreatic juices
What’s the function of mechanical breakdown and propulsion ?
Peristalsis
Segmentation
What’s the function of absorption ?
Nutrients
Water
What are the 3 sections of the gut tube?
Foregut
Midgut
Hindgut
Whats organs are apart of the foregut ?
Oesophagus
Stomach
Proximal half duodenum
Liver
Pancreas
Spleen
Where does the oesophagus begin ?
Begins at inferior end of pharynx.
Through diaphragm T10.
What are 3 main constrictions of the oesophagus ?
Origin.
Crosses by arch of aorta and left bronchus.
Through diaphragm.
What are the 4 layers of the oesophagus ?
Mucosa
Submucosa
Muscularis
Adventitia
What is the mucosa ?
Inner layer.
It is moist to help find pass smoothly into the stomach.
What is the submucosa?
Contains glands that produce mucus (secretions). Keeps the oesophagus moist.
What is the muscularis?
Muscle layer.
Pushes food down into the stomach.
What is the adventitia?
Outer layer.
Attaches the oesophagus to nearby parts of the body.
What is the transpyloric plane ?
Is an axial plane located midway between the jugular notch and supeuro border of pubic symphsis.
At the level of L1 vertebral body.
What is peritoneal ?
The tissue that lines abdominal wall and covers most of the organs in the abdomen
What organs are peritoneal ?
Stomach
First part of duodenum
Jejunum
Ileum
Transverse colon
Sigmoid colon
Liver
Spleen
What’s retroperitoneal ?
The area in the back of the abdomen behind the peritoneum.
What organ are retroperitoneum?
Adrenal glands
Aorta
Kidneys
Oesophagus
Ureters
Pancreas
Rectum
What is intraperitoneal ?
Within the peritoneal cavity (area that contains the abdominal organs ).
What organs are intrperitoneal ?
Jejunum
Ileum
Transverse colon
And sigmoid colon
What is peritoneum ?
Is a continuous membrane which lines the abdominal cavity and covers the abdominal organs (abdominal viscera).
What the structure of peritoneum?
Consists of 2 layers:
Parietal peritoneum
Visceral peritoneum
that are continuous with each other.
What is parietal peritoneum ?
Is a serous membrane covering the inner surface of the abdominopelvic cavity.
Including anterior and posterior walls of the abdomen.
Inferior surface of the diaphragm and the walls and floor of the pelvic cavity.
What is visceral peritoneum ?
Invaginates to cover the majority of the abdominal viscera.
What is the peritoneal cavity ?
Potential space between the parietal and visceral peritoneum. Contains a small amount if lubricating fluid.
What is mesentery?
Is a double layer of viscera peritoneum.
Connects an intraperitoneal organ to the posterior abdominal wall.
What is omentum?
Are sheets of visceral peritoneum that extend from the stomach and proximal part of the duodenum to other abdominal organs.
Whats the greater omentum?
Consists of 4 layers of visceral peritoneum.
It descends from the greater curvature of the stomach and proximal part of the duodenum. Then folds back up and at this to the anterior surface of the transverse colon.