Echinoderm

Question 1

a marine invertebrate of the phylum Echinodermata, such as a starfish, sea urchin, or sea cucumber.

Answer 1

Echinoderm

Question 2

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

Answer 2

Endoskeleton

Question 3

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

Answer 3

Pedicellariae

Question 4

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

Answer 4

Madreporite

Question 5

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 5

Radial canal

Question 6

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 6

Ring canal

Question 7

A mobile C-arm is a medical imaging device that is based on X-ray technology and can be used flexibly in various ORs within a clinic. The name is derived from the C-shaped arm used to connect the X-ray source and X-ray detector to one another.

Answer 7

Arm / Ray

Question 8

symmetry around a central axis, as in a starfish or a tulip flower.

Answer 8

Radial Symmetry

Question 9

the property of being divisible into symmetrical halves on either side of a unique plane.

Answer 9

Bilateral Symmetry

Question 10

(in an echinoderm) a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.

Answer 10

Water Vascular System

Question 11

his ambulacral groove extends from the mouth to the end of each ray or arm. Each groove of each arm in turn has four rows of hollow tube feet that can be extended or withdrawn

Answer 11

Ambulacral Groove

Question 12

a very small bone, especially one of those in the middle ear.

Answer 12

Ossicles

Question 13

one of the tubular pouches opening into the alimentary canal in the pyloric region of most fishes.

Answer 13

Pyloric Caecum

Question 14

The pylorus is considered as having two parts, the pyloric antrum (opening to the body of the stomach) and the pyloric canal (opening to the duodenum). The pyloric canal ends as the pyloric orifice, which marks the junction between the stomach and the duodenum.

Answer 14

Pyloric Stomach

Question 15

…consists of a mouth; an esophagus; a two-chambered foregut; a midgut with outpocketings called digestive glands, or hepatopancreas; and a hindgut, or rectum. The large anterior foregut, or cardiac stomach, occupies much of the posterior aspect of the head and the anterior thoracic body cavity.

Answer 15

Cardiac Stomach

Question 16

a roughly spherical flask with two handles, used in ancient Rome.

Answer 16

Ampullae

Question 17

an organ that produces gametes; a testis or ovary.

Answer 17

Gonads

Question 18

Central disc protrusion is a type of herniated or bulging disc that affects the spinal cord and could possibly result in nervous system disorders, such as radiating pain and muscle weakness as well as other symptoms stemming from nerve irritation. … Radiating or traveling pain along the nerve.

Answer 18

Central Disc

Question 19

(in an echinoderm) each of a large number of small, flexible, hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food and operated by hydraulic pressure within the water-vascular system.

Answer 19

Tube Feet

Question 20

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 20

External Fertilization

Question 21

the action or process of regenerating or being regenerated, in particular the formation of new animal or plant tissue.

Answer 21

Regeneration

Question 22

a starfish

Answer 22

Sea star

Question 23

Brittle stars or ophiuroids are echinoderms in the class Ophiuroidea closely related to starfish.

Answer 23

Brittle star

Question 24

a marine echinoderm that has a spherical or flattened shell covered in mobile spines, with a mouth on the underside and calcareous jaws. Many species are harvested for food.

Answer 24

Sea urchin

Question 25

a flattened sea urchin that lives partly buried in sand, feeding on detritus.

Answer 25

Sand dollar

Question 26

a sedentary marine echinoderm that has a small body on a long jointed stalk, with featherlike arms to trap food.

Answer 26

Sea lilies

Question 27

an echinoderm with a small disklike body, long feathery arms for feeding and movement, and short appendages for grasping the surface.

Answer 27

Feather stars

Question 28

an echinoderm that has a thick, wormlike body with tentacles around the mouth. They typically have rows of tube feet along the body and breathe by means of a respiratory tree.

Answer 28

Sea cucumbers

Question 29

Sea daisies are small, circular animals related to sea stars. … Sea daisies have no arms, but the circle is rimmed with flat spines that look like daisy petals. The upper surface of the animal is delicately plated. The bottom surface has a mouth frame that leads to a shallow stomach and has a single ring of tube feet.

Answer 29

Sea daisies