Sci 5 Vertebrates-Fish Vocabulary List

21 terms by swilson_bayside 

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21 Terms including Fish Anatomy

Vertebrates-

animals with a backbone; They all have bilateral symmetry and endoskeletons

5 Classes of Vertebrates:

Fish, Amphibians, Reptiles, Birds and Mammals

Fish-

the largest group of vertebrates- 25,000 species; have been on Earth 500 million years; first vertebrates to evolve

Three groups of fish:

jawless, cartilaginous and bony

Fish Common Characteristics

All are aquatic, cold-blooded, breathe with gills and have scales

Ichthyologists-

scientists who study fish

Fusiform-

a body form that is compressed at the sides and tapered at the tail making it easy to glide through the water

Dorsal-

along the top or back

Ventral -

underneath side

Lateral-

side of the fish

Fins

a membrane supported by rays or spines that function in swimming or orientation in the water

Types of Fins

Dorsal fins, Anal fins, Pelvic fins, Pectoral fins, Caudal fin

Gills-

feathery structures located on the sides of the head that removes oxygen from the water and allows it to enter the blood

Gill rakers-

function is to keep food out of the gills

Operculum-

bony plate covering the gills; function is to draw water over the gills

Lateral line-

a row of tiny holes in the skin that begins behind the gill cover and runs along the side to the tail; helps the fish feel movement in the water

Scales-

all fish have scales to protect their bodies; fish can be classified according to the shape and characteristics of their scales

Swim bladder-

most fish have this "air" bladder to help move up and down in the water

Mouth-

the location, shape and size of the mouth can be a good indicator of what the fish eats and where it lives

Barbells-

some fish have these "whisker-like" structures to aid in feeling and can be covered with taste buds

Nostrils (nares)-

are not for breathing; nares allow the fish to smell things in the water

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