Fish

Question 1

Unpaired Fins

Answer 1

Two dorsal fins, caudal fin, and anal fin

Question 2

Spiny Dorsal Fin

Answer 2

Maneuvering, stabilization and defense

Question 3

Soft Dorsal Fin

Answer 3

Low speed maneuvering and swimming

Question 4

Caudal Fin

Answer 4

Propulsion

Question 5

Anal Fin

Answer 5

Stabilization

Question 6

Paired Fins

Answer 6

Pectoral fins and pelvic fins

Question 7

Pectoral Fin

Answer 7

Swimming, maneuvering, and stabilization

Question 8

Pelvic Fin

Answer 8

Stabilization

Question 9

Operculum

Answer 9

Gill cover. Protects gills and serves as “bellows” to help pump water over gills

Question 10

Branchiostegal Membrane

Answer 10

Seals operculum and prevents backflow of water into the gill chamber

Question 11

Nares

Answer 11

Consist of both incurrent and excurrent apertures, used in odor detection, not breathing

Question 12

Lateral Line

Answer 12

A series of small fluid-filled canals lying just beneath the skin on the head and along the sides of the body. This complex system of receptors transforms underwater sound or mechanical disturbance into nerve impulses

Question 13

Caudal Peduncle

Answer 13

Generates power to the caudal fin for swimming

Question 14

Stomach

Answer 14

Food storage and digestion. Note the pyloric caeca which aid in both digestion and absorption

Question 15

Gall Bladder

Answer 15

A sac, usually green, that holds bile for enzymatic digestion

Question 16

Intestine

Answer 16

Simple intestines for digestion

Question 17

Liver

Answer 17

Bile secretion, glycogen, and vitamin D storage

Question 18

Spleen

Answer 18

Maintenance of blood (destroys old RBCs and makes new RBCs)

Question 19

Heart

Answer 19

Two chambers, atrium and ventricle

Question 20

Gill Rakers

Answer 20

Strains water and retains food

Question 21

Gill Arches

Answer 21

Supports the gills

Question 22

Gill Lamellae

Answer 22

Feather-like portion of the gills responsible for gas exchange

Question 23

Kidneys

Answer 23

Elimination of waste and regulation of internal environment

Question 24

Gonads

Answer 24

Female, ovaries: egg and hormone production. Male, testes: sperm production

Question 25

Cloaca

Answer 25

A common chamber receiving the openings of the urinary tract, oviduct (females) or vas deferens (male) and the intestine

Question 26

Swim Bladder

Answer 26

Hydrostatic balancing and sound production

Question 27

Myomeres

Answer 27

Blocks or bundles of skeletal muscle. Note the shape of each bundle. The space between each myomere is called the myosepta