Frog dissection

Question 1

Fat bodies

Answer 1

Spaghetti shaped structures w/ bright orange colours

(usually on the inside of abdominal wall)

Question 2

Peritoneum

Answer 2

Spider-web like membrane covering many of the organs

Question 3

Liver

Answer 3

Brown, largest structure of body cavity

Not primarily a digestive organ but secretes bile (needed for digestion of fats)

Question 4

3 lobes of the liver

Answer 4

• Right lobe
• Left anterior lobe
• Left posteria lobe

Question 5

Heart

Answer 5

Triangular structure with L&R atria and single ventricle

Question 6

Conus arteriosus

Answer 6

Large vessel extending out from the heart

Question 7

Lungs

Answer 7

2 spongy organs underneath/behind the heart and liver

Question 8

Gall bladder

Answer 8

Small green sac under the liver that stores bile

Question 9

Pyloric sphincter valve

Answer 9

Regulates the exit of digested food from stomach to small intestine

Question 10

Small intestine

Answer 10

Straight portion: duodenum
Curled portion: Ileum

Question 11

What holds the ileum together?

Answer 11

Mesentery (a membrane)

Blood vessels running through mesentery will carry absorbed nutrients away from intestine

Question 12

Large intestine

Answer 12

Leads to cloaca

Question 13

Spleen

Answer 13

In folds of mesentery, dark red sphere that serves as a holding area for blood

Question 14

Esophagus

Answer 14

Tube that leads from frog’s mouth to stomach

Question 15

Kidneys

Answer 15

Flattened bean shaped organs at lower back of frog
Filter waste from blood, often have fat bodies attached to top

Question 16

Testes

Answer 16

Located at top of kidneys in male frogs

Question 17

Oviducts

Answer 17

Curly structure around outside of kidney in female frogs
Where eggs are produced

Question 18

Vestigial oviducts

Answer 18

In male frogs, serve no actual purpose

Question 19

Bladder

Answer 19

Empty sac located at lowest part of body cavity

Question 20

Cloaca

Answer 20

Urine, sperm and eggs exit here