50.6 Skeletal System Types

Question 1

types of skeletons

Answer 1

hydrostatic

• exoskeleton
• endoskeleton

Question 2

hydrostatic skeleton

Answer 2

have fluid held under pressure in a closed body compartment

• cnidarians, flatworms, nematodes, annelids
• move by using muscles to change the shape of the compartments

Question 3

how do worms move

Answer 3

-hydrostatic skeleton
-wavelike motions
-fluid in coelomic cavity is divided into segments
—–Peristalsis: rhythmic contractions from front to back
when the segments move individually, they push fluid forwards while back sections contract

Question 4

Exoskeletons

Answer 4

hard encasement-

• arthropods have a “cuticle”
• muscles are attached to he exoskeleton
• arthropods are made of chitin
• molting

Question 5

endoskeletons

Answer 5

hard supporting elements inside the soft tissues of animals
-bones
-