Lecture 1 Didn't Know

Question 1

Mesentery

Answer 1

Double layer of Peritoneum (serous membrane) that folds over onto itself and suspends organs in the abdominal cavity by anchoring them to the POSTERIOR Abdominal Wall

Question 2

What are the Bony Components of Abdominal Wall?

Answer 2

1. Lumbar Vertebrae
2. Upper wings of Pelvic Bones
3. Costal Margin
4. Floating Ribs (11 and 12)

Question 3

Scarpas Fascia:

Answer 3

1. Deepest Layer of Abdominal Cavity Superficial Fascia below the Umbilicus
2. MEMBRANOUS
3. Fuses with Fascia Lata in the thigh
4. Becomes Colles Fascia in the Perinuem
5. Becomes Dartos Fascia in the Penis/Scrotum

Question 4

What is an Aponeurosis?

Answer 4

Thick flat membranous insertion of an Abdominal muscle such as the Internal Oblique, External Oblique, or Transversus Abdominus that attaches to the Linea Alba (midline)

Question 5

External Oblique

Answer 5

1. Most SUPERFICIAL of Lateral Muscles Abdominal Cavity
2. Hands in pockets Orientation (Inferomedial)
3. Aponeurosis (thick flat tendinous insertion that attaches to Linea Alba (midline)
4. Twists and Compresses Abdomen (supports abdominal components and posture)

Question 6

What forms the Inguinal Ligament and what are its origins and insertions?

Answer 6

1. External Oblique Aponeurosis

2. Originates from ASIS (Anterior Superior Iliac Spine) and Inserts at Pubic Tubercle

Question 7

Which two abdominal muscles are in the same plane?

Answer 7

Internal Oblique and Rectus Abdominus

Question 8

Internal Oblique

Answer 8

1. Deep to External Oblique
2. Same Plane as Rectus Abdominus
3. Fibers run Superomedially (OPPOSITE of hands in pockets)
4. Ends at Linea Alba (midline)
5. Compresses Abdomen & Twists

Question 9

What is the Linea Alba?

Answer 9

Midline of Abdominal Cavity that runs from Xiphoid Process down to Pubic Symphysis