Question

Segmentation in the annelid worms has facilitated locomotion and specialization of different parts of these animals. Evaluate the following statements about segmentation in the annelids and determine if they are true or false.
a. Excretion is accomplished by paired protonephridia with flame cells in every segment of the body ci k to select
b. If the organs in one segment fail, the organs of another segment will still function
c. Annelids possess both circular and longitudinal muscles that produce waves of contraction that are propagated down through the points eBookseries of segments.
d. Segmentation has allowed for specialization in the anterior of the annelid body, which has provided for a more sophisticated nervous system

Answer 1

Answer:

a. Excretion is accomplished by paired protonephridia with flame cells in every segment of the body. True

Most anelids have structures called metanephrids or protonephridia. Both structures are homologous to the kidneys and have the function of excresion, A pair are present in every segment of the body.

b. If the organs in one segment fail, the organs of another segment will still function. False

It is false because all segments are interrelated and have different functions depending on their location.For example, the first segment is where the sensory appendages are, such as the antennae and the eyes. The second segment is where the mouth is. There are a series of parapod segments to move, collectively called metameres and ends in a terminal portion called pigidium, where the anus is located.

c. Annelids possess both circular and longitudinal muscles that produce waves of contraction that are propagated down through the points eBookseries of segments.True

True because anelids have circular and longitudinal muscles that serve to function the hydrostatic skeleton.

d. Segmentation has allowed for specialization in the anterior of the annelid body, which has provided for a more sophisticated nervous system. True

True because the segmentation allows to have a nervous system formed by a ventral nerve cord provided with ganglia and lateral nerves in each segment.