Unit 8 Comparative Anatomy of Ascaris lumbricoides and Asterias rubens

Question 1

generate

Answer 1

The organism has special organs to do the job of that system.

It does the work itself.

✅ Example: A human has lungs to breathe — we get oxygen on our own.

Question 2

degenerate

Answer 2

The organism doesn’t have special organs for that system.

It relies on the environment to do the job.

✅ Example: A flatworm has no lungs — it gets oxygen through its skin because it lives in water.

Question 3

Ascaris lumbricoides

Answer 3

Parasitic roundworm

Question 4

Diecious

Answer 4

Two distinct sexes

Question 5

sexual dimorphism

Answer 5

differences in appearance between males and females of the same species. These differences can include:

Question 6

Fecundity of Ascaris lumbricoides

Answer 6

lay up to 200,000 eggs a day, helping it spread quickly.

Question 7

Ascaris lumbricoides cuticle form

Answer 7

skin like material

Question 8

Ascaris lumbricoides cuticle

Answer 8

a thick, protective outer layer that shields the worm from harm inside the host.

also helps with breathing by allowing gases(oxygen) to pass through it.

Question 9

Ascaris lumbricoides intestine form

Answer 9

a long tube

Question 10

Ascaris lumbricoides intestine function

Answer 10

helps digest and absorb nutrients from the host’s food.

Question 11

Ascaris lumbricoides ovaries function

Answer 11

produce eggs for reproduction.

Question 12

Ascaris lumbricoides ovaries form

Answer 12

long, coiled structures

Question 13

Ascaris lumbricoides uterus function

Answer 13

stores the eggs before they are laid/site of fertilization

Question 14

Ascaris lumbricoides uterus form

Answer 14

large, coiled tube

Question 15

Ascaris lumbricoides vagina function

Answer 15

passage way to external environment

Question 16

Ascaris lumbricoides vagina form

Answer 16

short muscular tube that connects the uterus to the outside and allows eggs to leave the body.

Question 18

high parental investment

Answer 18

having fewer offspring but putting more resources into your offspring so they have a better chance of surviving

Question 19

low parental investment

Answer 19

having more offspring but putting less resources into your offspring so they have a worse chance of surviving

Question 20

regeneration

Answer 20

ability to regrow parts of your body

Question 21

Asterias rubens

Answer 21

sea star

Question 22

Asterias rubens ampulle function

Answer 22

round, bulb-like structures inside the body that squeeze to fill the tube feet with water and make them extend.

Question 23

Asterias rubens dermal papillae

Answer 23

small, soft bumps on the skin that help with breathing and feeling the surroundings.

help with breathing by allowing oxygen to pass through their thin surface directly into the body and letting carbon dioxide out.

Question 24

Asterias rubens gonads

Answer 24

weird horse shoe looking thing
produce gametes

Question 25

Asterias rubens hepatuc cecum

Answer 25

branched, digestive glands in each arm that help break down food and absorb nutrients.

Question 26

Asterias rubens madreporite(sieve plate)

Answer 26

point where water enters into the sea star

Question 27

Asterias rubens tube feet

Answer 27

small, flexible extensions that help the starfish move and hold onto things