ZOO 3733L - Gross Anatomy Lab I

Dissections of May 28 - 30, 2002

N.B.		In each dissection some names appear in parentheses. These are structures that may not readily be found during your dissection, i.e., look for them but do not spend too much time on them so that you have time to comlete the laboratory. Many of these structures will be exposed more completely in future dissections or are best observed in your atlas. Also, there will be important structures listed that are not found in your dissector (Hansen, 1998); information about these items can be found in your text (Jenkins, 1998; Moore & Agur, 2002; Stern, 1997).

ANT. ABDOMINAL WALL; SCROTUM; SPERMATIC CORD, TESTIS (Ch. 2, pp. 19-25)

Dissection notes

Take care in skinning the region of the superficial inguinal ring in males to avoid performing a "radical vasectomy".
It is recommended that Sections I and II.D be done first and then Sections II.A-C; i.e., dissect all of the abdominal muscles first before dissecting the scrotum, spermatic cord and testis.
An alternate dissection for the scrotum from that described in Hansen (1998) will be used in lab; specifically, using the spermatic cord as a guide for your scissors, simply cut through the scrotal wall all the way to its base.
The structures followed by an "MG" below can be observed on both the male genitalia model (MG) and the cadavera

landmarks/regions
	xiphisternal junction
	costal margin
	pubic symphysis - MG
	pubic tubercle
	anterior superior iliac spine
	inguinal triangle 

myology
	external oblique
		linea alba
	internal oblique
	transversus abdominis
		conjoint tendon
	rectus abdominis - MG
		tendinous inscriptions
		rectus sheath - MG 
			arcuate line

neurology
	(ilioinguinal n)

angiology
	inferior epigastric a - MG 
	inferior epigastric v - MG 
	superior epigastric a
	superior epigastric v

splachnology.
	(transversalis fascia (endoabdominal))
	inguinal canal - MG 
		superficial inguinal ring - MG 
		(deep inguinal ring) - MG 
	inguinal ligament
		(lacunar ligament)
	spermatic cord - MG 
		cremasteric muscle - MG 
		ductus (vas) deferens - MG 
		testicular a - MG 
		pampiniform plexus - MG 
	testis - MG 
		tunica vaginalis testis
		epididimys - MG 
		(efferent ductules)
		(gubernaculum)
	round ligament (of the uterus)

III. PERITONEUM AND PERITONEAL CAVITY (Chap. 2; pp. 26-39)

Dissection notes

In this section open the peritoneal cavity as directed in the dissector but do not cut the hepatogastric portion of the lesser omentum (p. 28), i.e., leave it intact.
Observation of the pancreas can be made by cutting a window in the greater omentum as shown in Netter figure 255.
Some bodies may have had abdominal surgery; your instructors will assist you in determining the course of action in these individuals.

peritoneum
	parietal peritoneum
	visceral peritoneum
	peritoneal cavity
		greater peritoneal sac
			omental (epiploic) foramen
		lesser peritoneal sac (omental bursa)
	greater omentum
		(gastrocolic ligament)
		(gastrolienal (gastrosplenic) ligament)
	lesser omentum
		(hepatoduodenal ligament)
		(hepatogastric ligament)
	mesentery
		root of the mesentery

splanchnology
	stomach:  cardiac (antrum), fundus, body and pyloric regions
		lesser curvature
		greater curvature
	small intestine
		duodenum
			(duodenojejunal junction)
		jejunum
		ileum
	large intestine:  teniae coli; haustra, appendices epiploicae
		cecum
		vermiform appendix
			(mesoappendix)
		ascending colon
		right colic (hepatic) flexure
		transverse colon
			transverse mesocolon
		left colic (splenic) flexure
		descending colon
		sigmoid colon
			sigmoid mesocolon
	liver
		falciform ligament
		ligamentum teres 
		(coronary ligament)
		lobes:  right, left, quadrate, caudate
	gall bladder
	spleen
	pancreas

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