Abeka Biology Chapter 19 Flashcards Preview

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Flashcards in Abeka Biology Chapter 19 Deck (25):
1

What fish may attain a length of 60 feet and a weight of 20 tons?

Whale shark (largest fish)

2

What are scientists that study fish?

Ichthyologists

3

What are fish whose skeletons are made either partially or wholly of bone called?

bony fish

4

What are the large flat covers that cover the gills?

opercula (operculum)

5

What are the most prominent features of the trunk and tail?

fins

6

What type of fins do most bony fish have?

pectoral and pelvic fins

7

What other fins does a typical bony fish have?

Dorsal and anal fin

8

What fin projects from the fish's tail which serves as a fish' propeller and rudder?

caudal fin

9

What bony covering do most bony fish have located just beneath the epidermis?

scales

10

In what pattern are the fish's skeletal muscles arranged?

W-shaped

11

What are the skeletal muscles called?

myomeres

12

True of False: Each myomere is controlled by a separate nerve, allowing the fish to move its body in a wavelike, undulating motion.

True

13

What special organs allow oxygen and carbon dioxide to pass between the water and the fish's blood?

gills

14

What two rows of long filaments branch from the gill arch?

gill filaments

15

What opening beneath each operculum opens into the fish's pharynx?

gill chamber

16

What vaselike projections from the front of each gill arch strain food particles and other debris out of the water, preventing the gils from becoming fouled by these sediments?

gill rakers

17

What system consists of special nerve endings that extends over its heat and the sides of its body that detects faint vibrations and pressure change?

lateral line

18

Through what opening are sex cells released?

urogenital opening

19

What is it called when fish lay their eggs?

spawn

20

What are the eggs known as?

roe

21

What fluid contains large numbers of sperm cells?

milt

22

What hollow, gas filled chamber located high in the fish's body cavity, allows a fish to adjust its buoyancy to that it can remain stationary at a fixed depth without having to tree water?

swim bladder

23

What gland in the wall of the bladder extracts oxygen or other gases from the fish's blood and uses the gas to inflate the swim bladder?

gas gland

24

What fish have skeletons made of cartilage rather than bone and thus are called?

cartilaginous fish

25

What include nearly 30 species of unusual cartilaginous fish that live near the ocean bottom?

chimaeras