ch. 28 Flashcards Preview

Biology (9th Grade) > ch. 28 > Flashcards

Flashcards in ch. 28 Deck (14):
1

neutral crest

group of cells that develop from the nerve cord in vertebrates

2

scale

small, flat, plate like structure near the surface of the skin

3

fin

paddle-shaped structure on a fish or other aquatic animal that is used balance, steering, and propulsion

4

operculum

movable flap that covers the gills and protects them

5

nephron

filtering unit within the kidney that helps maintain the salt and water balance of the body and to remove cellular waste products from the blood

6

lateral line system

enables fishes to detect movement in the water and also helps to keep them upright and balanced

7

spawning

process which male and female fishes release their gametes near each other in the water

8

swim bladder

gas-filled space like a balloon found in bony fishes that allows fish to control its depth

9

tetrapod

four-footed animal with legs that have feet and toes that have joints

10

cloaca

chamber that receives the digestive wastes, urinary waste, and eggs or sperm before they leave the body

11

nictiating membrane

transparent eyelid that can move across the eye to protect it underwater and keep it from drying out on land

12

tympanic membrane

an eardrum

13

ectotherms

animals that obtain their body heat from the external environment

14

cartilage

tough, flexible material making up the skeletons or parts of skeletons of vertebrates