Chapter 40 Circulatory System Flashcards
What has invertebrate circulatory systems?
sponges, cnidarians, and nematodes
How do sponges circulate water?
using many incurrent pores and one excurrent pore
How do hydras circulate water?
through a gastrovascular cavity which is also for digestion
How do nematodes circulate water?
through their digestion tract which doubles as their circulatory system because they are so thin
Open circulatory system
- No distinction between circulating and extracellular fluid
What is the fluid in the open circulatory system called?
hemolymph
closed circulatory system
- distinct circulatory fluid enclosed in blood vessels and transported away from and back to the heart
What is makes up a fishes circulatory system?
- Evolved a true chamber-heart pump heart
- have a 2 chambered heart
- the blood is pumped through the gills, and then to the rest of the body
Amphibians have what 2 circulations?
pulmonary circulation, and systemic circulation
Pulmonary circulation
moves blood between the heart and lungs
Systemic circulation
moves blood between the heart and the rest of the body
How many heart chambers do amphibians have?
3 chambered heart
How many heart chambers do reptiles have?
3 chambered heart
How many atria and ventricles do reptiles have?
2 atria and 2 ventricles
How many heart chambers do mammals, birds, and crocodilians have?
4 chambered heart
How many atria and ventricles do mammals, birds, and crocodilians have?
2 separate atria and 2 separate ventricles
In mammals what does the right atrium do?
receives deoxygenated blood from the body and delivers it to the right ventricle, which pumps it to the lungs