Laboratory Exercise VII

Necturus maculosus

Body cavities and mesenteries:

Body cavities: *pericardial cavity, *transverse septum, *pleuroperitoneal cavity

Mesenteries:

Derivatives of the dorsal mesentery: *mesogaster, *gastrosplenic ligament, *mesentery proper, *mesocolon, *pulmonary ligaments

Derivatives of the ventral mesentery: *falciform ligament, *coronary ligament, *median ligament of the bladder, *mesorchium, *mesotubarium

Digestive and respiratory systems:

Digestive system:

Alimentary canal: lips, *teeth, *internal nares, tongue, *pharynx, internal gill slits, *glottis, esophagus, stomach, *rugae, *pyloric sphincter, small intestine, duodenum, *plicae, large intestine, anus, cloaca

Accessory digestive organs: *liver, *gall bladder, *hepatic ducts, cystic duct, *common bile duct, *pancreas, *spleen

Respiratory system: *external gills, gill slits, *external nares, *trachea, *lungs

                Differentiate among the three forms of respiration used by Necturus.

Urogenital system:

Urinary system:

Kidney and ducts: *kidney, suprarenal glands, *archinephric duct, collecting tubules, urinary bladder

Reproductive system:

Female: *ovaries, *mesovarium, *oviduct, *mesotubarium, *ostium tubae

Male: *testes, *mesorchium, vestigial oviduct, *cloacal gland

Circulatory and lymphatic systems

Circulatory system:

Heart: *pericardial cavity, *parietal pericardium, *visceral pericardium, *ventricle, *atria, *conus arteriosus, *ventral aorta, *bulbus arteriosus, *sinus venosus, *posterior vena cava,

DO NOT open the heart, use the model to identify the following structures: muscular trabeculae, *interventricular septum, *interatrial septum, *sinoatrial valve, *atrioventricular valves, *semilunar valves

Arteries:

Ventral aorta and afferent branchial arteries: *ventral aorta, *1^st afferent branchial artery, *common trunk of 2^nd and 3^rd branchial arteries

Efferent branchial arteries, dorsal aorta and its branches: 1^st efferent branchial artery, 2^nd and 3^rd branchial arteries, radix of the aorta, *dorsal aorta, *subclavian artery, *gastric artery, *dorsal and ventral gastric, *splenic, *coeliacomesenteric, *mesenterics, *testicular/ovarian, *renals

Veins:

Renal portal system: *renal portal, *posterior cardinals

Posterior vena cava: *posterior vena cava, *efferent renal veins, *ovarian/testicular veins, *hepatic sinuses, *common cardinals (hard to distinguish from hepatic sinuses)

Pulmonary veins: *pulmonary veins

Hepatic portal system: *mesenterics, *intestinals, *gastrosplenic, *pancreatics, *hepatic portal

Ventral abdominal vein and associated veins of the hindlimb: *ventral abdominal

Veins of the head and forelimb: *subclavians

* Know function (use laboratory text as a guide). 

For ALL blood vessels- prepare a complete “function” that includes the organ(s) to which it supplies blood or from which it drains blood, and the anatomical direction through which blood flows.