Fishes in General (Chondricthyes, Sarcopterygii, Actinopterygii)

Question 1

Caudal fin function?

Answer 1

+ Speed

- Maneuverability

Question 2

Pectoral fin function?

Answer 2

• Speed

+ Maneuvarbility

Question 3

Dorsal / Anal fin function?

Answer 3

Moderate speed and maneuverability

Question 4

Anal fin function

some fishes

Answer 4

Swim backwards

Question 5

Actinopterygii digestive path

Answer 5

Mouth -> pharynx -> stomach / pyloric cecae -> duodenum/pancreas -> intestine -> rectum -> anus

Question 6

Chondrichthyes digestive path

Answer 6

Mouth -> pharynx -> stomach -> rugae -> duodenum/pancreas -> ileum (spiral valve) -> rectum -> rectal gland -> anus

Question 7

Typical fish gas exchange path

Answer 7

High O2 leaves the gill capillaries -> dorsal aorta -> systemic arteries -> systemic capillaries (turns into Low O2) -> systemic veins -> sinus spinosis -> atrium -> ventricle -> bulbous arteriosis -> ventral aorta -> gills -> gill capillaries

Question 8

How do fish keep their gas from reaching equilibrium?

Answer 8

Counter-current exchange

Allows for diffusion

Question 9

Vision via

Answer 9

Eyes

Question 10

Olfaction via

Answer 10

Nostrils

Question 11

Lateral line function?

Answer 11

Sense water current

Question 12

How do typical fish sense electrical fields?

Answer 12

Ampullae of Lorenzini

Ions moving around an object creat an electricl field

Question 13

Mechanoreception via

Answer 13

auditory ossicles