Updated By: LatestGKGS Desk
Circulatory System: Blood Circulation in various organisms
Types of Circulatory System and mechanism in chordates and non-chordates
- The open circulatory system is present in arthropods and mollusks in which blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses.
- Annelids and chordates have a closed circulatory system in which the blood pumped by the heart is always circulated through a closed network of blood vessels. This pattern is considered to be more advantageous as the flow of fluid can be more precisely regulated.
- In amphibians and reptiles, the left atrium receives oxygenated blood from the gills/lungs/skin and the right atrium gets the deoxygenated blood from other body parts. However, they get mixed up in the single ventricle which pumps out mixed blood.
- Animals such as sponges and Hydra do not possess any circulatory system. The water in which they live brings food and oxygen as it enters their bodies. The water carries away waste materials and carbon dioxide as it moves out.
- Animals such as sponges and Hydra do not possess any circulatory system. The water in which they live brings food and oxygen as it enters their bodies.
