Terminology 2

Question 1

archenteron

Answer 1

The embryonic gut cavity, lined with endoderm.

Question 2

blastula

Answer 2

The ball of cells formed during cleavage, usually containing a blastocoele.

Question 3

coelom

Answer 3

A body cavity that is completely lined by an epithelium of mesodermal derivation.

Question 4

enterocoele

Answer 4

A coelom that develops primitively as buds from the gut cavity.

Question 5

gustatory

Answer 5

Pertaining to the sense of taste.

Question 6

mesoderm

Answer 6

The central germ layer of an early embryo; gives rise to most of the connective tissue, muscles, and blood.

Question 7

neurogenic placodes

Answer 7

A thickened disk of ectoderm that gives rise to certain sense organs and nerves.

Question 8

peritoneal cavity

Answer 8

The part of the mammalian group that includes those ungulates with an odd number of digits (three or one): the rhinoceros, tapirs, horses.

Question 9

schizocoele

Answer 9

A coelom formed by cavitation of the mesoderm rather than by enterocoelic pouches, characteristic of protostomes.

Question 10

sessile

Answer 10

Describes an animal that lives attached to its substratum.

Question 11

somatic

Answer 11

Refers to structures that develop in the body wall or appendages as opposed to those in the gut tube, such as the somatic muscles, somatic skeleton.

Question 12

somites

Answer 12

One of the series of dorsal segments, or divisions of the paraxial mesoderm in the rostral part of the head of a developing embryo.

Question 13

tunic

Answer 13

Describes a layer of an organ, such as layers of the eyeball.

Question 14

viscera

Answer 14

A collective term for the internal organs.

Question 15

myomere

Answer 15

A muscle segment, usually applied to adult segments.