Question

what systems have been reduced in an Echinodermata as compared to an annelida?

Answer 1

What are those?

Answer 2

Echinodermata is a starfish and a annelida is an earthworm

Answer 3

and what do you mean by systems?

Answer 4

Like a circulatory system, if you don't know what a system means when i refer to an organism then you are no help.

Answer 5

I thought you're talking about equations and I'm curious.

Answer 6

Yeah, i guess that make sense since this is a math site but i was just hoping that maybe someone would know by luck. Read about it if you are that curious.

Answer 7

Maybe because of its health the systems are reduced.

Answer 8

Nah it's a comparison between the two organisms systems, I already figured out the answer but thanks for your help.

Answer 9

what is it?

Answer 10

The starfish have an open circulatory system meaning they have no heart to pump the blood, so the blood is stored throughout their tissues. Earthworms have a closed circulatory system, so they have veins and arteries to carry the blood and they have aortic arches that pump the blood throughout the system. So, the answer is the circulatory system.

Answer 11

Oh ok. I'm sorry I didn't know the answer. My Life Science teacher did not teach me about it.

Answer 12

You will probably learn about it someday when you take a biology course.

Answer 13

Is Life Science considered biology?

Answer 14

Well, biology is the study of life so technically yes, but I am talking about a more advanced biology class like a college course or an ap class in high school.

Answer 15

I learned 7th grade life science.

Answer 16

And it's basic things like cells, tissues, and organs.

Answer 17

If you take another biology course just ask the teacher about the starfish's and earth worms circulatory systems and I am sure you will impress them.

Answer 18

Ok I like Starfish and whales and dolphins.