introduction

Question 1

functions

Answer 1

1. transport o2 and co2
2. provide nutrients and remove waste
3. body temperature regulation
4. hormone circulation
5. blood clotting

Question 2

types

open

Answer 2

blood flows freely in body cavity, makes direct contact with organs and tissues. fluid is a mixture of blood and hemolymph

invertebrates: snails, crustaceans

Question 3

types

closed

Answer 3

blood is contained in vessels, kept separate from interstitial fluid

vertebrates: humans, octopus, earthworm