Lecture 8 - The GI System

Beschreibung

The Abdominal Wall and Cavity
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Frage Antworten
Label the following Anterior abdominal wall surface markings on the diagram... - Xiphoid process - Costal margins - Iliac crest - Anterior superior iliac spine - Pubic tubercle
Label the following on the bony pelvis: - Iliac crest - Anterior superior iliac spine - Pubic tubercle - Pubic Symphysis - Hip bone (Ilium, Pubis, and Ischium).
Label the following reference planes on the abdomen: - Midclavicular lines - Subcostal line - Intertubercular line
Which lumbar vertebrae are in line with the following reference planes: - Subcostal line? - Intertubercular line? - L2 - L5
What is another term for the Intertubercular line? Transtubercular line
How many regions does the abdomen get divided into with our reference planes? 9 regions
What is the name of the region of the abdomen where the umbilical cord is detached? The umbilical.
What is the name of the upper central region of the abdomen? - Epigastric
Name the 9 divisions of the abdomen on the following diagram...
Label the layers of the anterior abdominal wall... - Skin - Camper's - Scarpa's - External oblique - Internal oblique - Transverse abdominus - Transversalis fascia - Extraperitoneal fascia - Parietal peritonea
Briefly describe the following layers: - Camper's - Scarpa's - External oblique - Internal oblique - - Transverse abdominis - Transversalis fascia - Extraperitoneal fascia - Parietal peritonea - Camper's = Fatty, superficial layer of subcutaneous tissue. - Scarpa's = Membranous, deep subcutaneous layer. - External oblique = External muscle. - Internal oblique = Middle layer muscle - Transverse abdominis = The deepest layer of muscle in the abdomen. - Transversalis fascia = Thin layer of subcutaneous tissue between the transverse abdominis & extraperitoneal fascia. - Extraperitoneal fascia = Subcutaneous tissue between the perietal peritoneum & the transversalis fascia. - Parietal peritoneum = Muscle that lines the abdominal and pelvic cavities.
Name the 4 muscles of the anterior abdominal wall. - Rectus abdominis muscle. - External oblique muscle. - Internal oblique muscle. - Transversus abdominis muscle.
What is the linea alba? A fibrous structure that runs down the midline of the abdomen in humans and other vertebrates (runs from the xihoid process to the pbic symphisis).
How do the anterior abdominal wall muslces all insert onto the linea alba? Via aponeurosis (a spread out, flattened tendon).
What is aponeurosis? A sheet-like, fibrous, flattened tendon connecting muscle to bone.
Where would surgeons make a clean incision along the abdomen during surgery? Along the linea alba... as it does not bleed a lot.
What is the rectus sheath? A covering surrounding the rectus abdominis - made from the aponeurosis of external oblique, internal oblique muscle and transversus abdominis.
What is the rectus abdominis? A large muscle infront of the abdomen, joining the sternum to the pubis and acting to bend the whole body forward or sideways.
What are the 5 purposes of abdominal muscles? - Move trunk - Depress ribs - Compress abdomen (evacuation, expiration, and heavy lifting). - Support intestines - Maintain posture
What is significant about the rectus abdominis in the goat? The muscle is much wider.
Label the following muscles on the adomen: - Pectoralis major - Serratus anterior - External oblique - Rectus abdominis - Latissius dorsi - Inguinal ligament
Label the latissimus dorsi on the body...
Label the Inguinal ligament of poupart on the bony pelvis.
Label the external oblique muscles in the dog.
Label the external oblique in the horse.
What is chronic obstructive pulmonary disease? A progressive disease that makes it difficult to breathe - abdominal muscles used to help it breathe.
Where are the internal oblique muscles in comparison to the external oblique muscles? Perpendicular to the external oblique muscles.
Label the following components of the abdomen: - Internal oblique muscles - Ribs - Cut edge of the external oblique aponeurosis
Label the following on the pony pelvis: - Anterior superior iliac spine/ ASIS
Where is the iliac crest located in the bony pelvis?
Label the following components of the abdomen: - Transversus abdominis - Cut edges of oblique muscle
Label the lumbar fascia on the following diagram.
Label the following arteries which supply blood to the anterior abdominal wall: - Internal thoracic artery - Superior epigastric artery - Inferior epigastric artery - Superficial epigastric artery - External iliac artery
Where do the following arteries arise from: - Superior epigastric artery? - Inferior epigastric artery? - Internal thoracic artery. - External iliac artery.
Where does the internal thoracic artery arise from? The subclavian artery.
Label the following arteries/ veins on the ventral view of the abdominal wall of the ruminant: - Cranial superficial epigastric arteries. - Cranial superficial epigastric veins - Caudal superficial epigastric veins - Caudal superficial epigastric arteries.
What is the name of the nerves which supply the abdominal muscles? Anterior rami of spinal nerves T7 - L1.
What is the peritoneum? A serous membrane/ serosa lining the abdominal cavity and organs to create a peritoneal cavity.
What is the peritoneum 'embryologically' equivalent to? The pleura around the lungs and the pericardium around the heart.
Describe the structure/ the tissue which makes up the peritoneum. A single layer of mesothelium supported by fibroelastic tissue.
Describe the difference between the parietal and the visceral peritoneum. - Parietal = The peritoneum which lines the abdominal and pelvic cavities. - Visceral = The peritoneum that covers the external surfaces of most abdominal organs - including intestinal tract.
What is meant by peritinitis? When the parietal cavity becomes infected when breached.
What are the 3 species formed by the fold/ reflections in the peritoneum? - Mesenteries - Menta - Ligaments
What are the viscera? The internal organs in the main cavities of the body i.e. the abdomen.
What is the purpose of the mesenteries formed from the peritoneum? To carry neurovascular supply to the viscera they contain.
What is meant by the greater omentum and the lesser omentum? - Greater omentum = A large apron-like fold of visceral peritoneum that hangs down from the stomach. - Lesser omentum = The double layer of peritoneum that extends from the liver to the lesser curvature of the stomach and the first part of the duodenum.
Why is the omentum seen as the 'Policeman of the Abdomen'? - It has a rich blood supply. - Excellent in healing (can be stitched over the area you wish to heal).
Label the following areas of the sternum: - Xiphoid process - Xiphisternal joint - Body of sternum - Transverse ridge - Sternal angle - Manubrium - Clavicular notch - Jugular notch - Facets for attachment of costal cartilges 1-7.
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