FIsh

Question 1

Vertebral column

Answer 1

another term for spinal column.

Question 2

Neural crest

Answer 2

is a transient embryonic structure in vertebrates that gives rise to most of the peripheral nervous system (PNS) and to several non-neural cell types, including smooth muscle cells of the cardiovascular system, pigment cells in the skin, and craniofacial bones, cartilage, and connective tissue.

Question 3

Fin

Answer 3

a flattened appendage on various parts of the body of many aquatic vertebrates and some invertebrates, including fish and cetaceans, used for propelling, steering, and balancing.

Question 4

Scale

Answer 4

each of the small, thin horny or bony plates protecting the skin of fish and reptiles, typically overlapping one another.

Question 5

Operculum

Answer 5

a structure that closes or covers an aperture, in particular.
technical term for gill cover.
a secreted plate that serves to close the aperture of a gastropod mollusk’s shell when the animal is retracted.

Question 6

Atrium

Answer 6

each of the two upper cavities of the heart from which blood is passed to the ventricles. The right atrium receives deoxygenated blood from the veins of the body; the left atrium receives oxygenated blood from the pulmonary vein.

Question 7

Ventricle

Answer 7

a hollow part or cavity in an organ, in particular.
each of the two main chambers of the heart, left and right.
each of the four connected fluid-filled cavities in the center of the brain.

Question 8

Nephron

Answer 8

each of the functional units in the kidney, consisting of a glomerulus and its associated tubule, through which the glomerular filtrate passes before emerging as urine.

Question 9

Lateral Line

Answer 9

a visible line along the side of a fish consisting of a series of sense organs that detect pressure and vibration.

Question 10

Sapwning

Answer 10

release or deposit eggs.

Question 11

swim bladder

Answer 11

a gas-filled sac present in the body of many bony fishes, used to maintain and control buoyancy.

Question 12

Jawless fish

Answer 12

both present and extinct species. The group excludes all vertebrates with jaws, known as gnathostomes

Question 13

cartilaginous fish

Answer 13

a fish of a class distinguished by having a skeleton of cartilage rather than bone, including the sharks, rays, and chimeras.

Question 14

Bony fish

Answer 14

a fish of a large class distinguished by a skeleton of bone, and comprising the majority of modern fishes.

Question 15

Devonian Period

Answer 15

and system of the Paleozoic Era spanning from the end of the Silurian Period, about 419.2 Mya (million years ago), to the beginning of the Carboniferous Period, about 358.9.