echinoderm

Question 1

an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

Answer 1

Endoskeleton

Question 2

a defensive organ like a minute pincer present in large numbers on an echinoderm.

Answer 2

Pedicellariae

Question 3

a perforated plate by which the entry of seawater into the vascular system of an echinoderm is controlled.

Answer 3

Madreporite

Question 4

one of the numerous minute canals lined with choanocytes which radiate from the paragastric cavity in some sponges and end just below the surface of the sponge.

Answer 4

Radial canal

Question 5

the circular water tube that surrounds the esophagus of echinoderms. 2 : the circular canal in the edge of the umbrella of a jellyfish that links the radial canals.

Answer 5

Ring canal

Question 6

having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea urchins, sea cucumbers, etc.

Answer 6

Arm / Ray

Question 7

everything sprouts from the center equaly

Answer 7

Radial Symmetry

Question 8

has 2 halves

Answer 8

Bilateral Symmetry

Question 9

The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet.

Answer 9

Water Vascular System

Question 10

This ambulacral groove extends from the mouth to the end of each ray or arm.

Answer 10

Ambulacral Groove

Question 11

Ossicles are small calcareous elements embedded in the dermis of the body wall of echinoderms. They form part of the endoskeleton and provide rigidity and protection. They are found in different forms and arrangements in sea urchins, starfish, brittle stars, sea cucumbers, and crinoids.

Answer 11

Ossicles-

Question 12

one of the tubular pouches opening into the alimentary canal in the pyloric region of most fishes. 2 : one of the tubular pouches opening into the ventriculus of an insect.

Answer 12

Pyloric Caecum

Question 13

the side of the starfish without the mouth. cardiac stomach. it is attached to the mouth and comes out of the mouth to the digest nutrients. pyloric stomach. connects to a pair of digestive glands and breaks down food with the help of enzymes.

Answer 13

Pyloric Stomach

Question 14

the surface opposite the mouth on an echinoderm. Water Vascular System. system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration. Cardiac Stomach. starfish can push this stomach outside the body to eat something.

Answer 14

Cardiac Stomach

Question 15

Ampullae are bulb-shaped structures located above the tube feet of starfish and other echinoderms. Ampullae are an important part of the water vascular system of starfish, which is the responsible for the animal’s locomotion.

Answer 15

Ampullae

Question 16

In males the gonads are called testes; the gonads in females are called ovaries. … The gonads in some lower invertebrate groups (e.g., hydrozoans) are temporary organs; in higher forms they are permanent. In some invertebrates, such as oligochaete worms and leeches, both male and female gonads exist in a single organism.

Answer 16

Gonads

Question 17

Central Disc

Answer 17

Referring to the side or surface of the body furthest from the mouth, usually contains the anus and is the “top” oral surface. the side of the starfish with the mouth. central disk. Central region of sea stars & brittle stars from which rays or arms radiate; contains madreporite, mouth, & anus.

Question 18

Tube feet are small active tubular projections on the oral face of an echinoderm, whether the arms of a starfish, or the undersides of sea urchins, sand dollars and sea cucumbers. They are part of the water vascular system.

Answer 18

Tube Feet

Question 19

External fertilization is a male organism’s sperm fertilizing a female organism’s egg outside of the female’s body. Internal fertilization, on the other hand, is the occurrence of internal insemination as the mode of combining sperm and egg. … The release of eggs and sperm into the water is known as spawning.

Answer 19

External Fertilization

Question 20

Echinoderms are also the largest phylum that has no freshwater or terrestrial (land-based) representatives. … Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb.

Answer 20

Regeneration

Question 21

Crinoids are marine animals that make up the class Crinoidea of the echinoderms. The name comes from the Greek word krinon, “a lily”, and eidos, “form”. They live in both shallow water and in depths as great as 9,000 meters

Answer 21

sea lillies

Question 22

Crinoids are marine animals that make up the class Crinoidea of the echinoderms. The name comes from the Greek word krinon, “a lily”, and eidos, “form”. They live in both shallow water and in depths as great as 9,000 meters.

Answer 22

feather stars

Question 23

Sea cucumbers are echinoderms from the class Holothuroidea. They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide.

Answer 23

sea cucumbers

Question 24

Sea daisies make up an unusual group of deep-sea taxa belonging to the phylum Echinodermata, with three species described in the genus Xyloplax.

Answer 24

sea daisies