Circulatory System Flashcards
What does the circulatory system do?
Transports blood, nutrients, and waste around the body
What is the first function of the circulatory system?
Transport gases from the respiratory system, nutrient molecules, and waste materials from the digestive system
What is the second function of the circulatory system?
Regulate internal temperature and transport chemical substances that are vital to health
What is the third function of the circulatory system?
Protect against blood loss from injury and against disease-causing microbes or toxic substances
What are the three major components of the circulatory system?
The heart, the blood vesels, and blood
What two components of the ciculatory system make up the cardiovascular system?
The heart and the blood vessels
What is the heart?
A muscular organ that continuously pumps the blood through the body and generates blood flow
What are the blood vessels?
A system of hollow tubes through which blood moves
What is blood?
A fluid that transports nutrients, oxygen, carbon dioxide, etc throughout the body
What are the two types of circulatory systems?
Open circulatory system and closed circulatory system
Briefly describe an open circulatory system
blood flows freely within the body cavity and makes direct contact with organs and tissue, no distinction between blood and interstitial fluid
What is interstitial fluid called in invertebrates?
hemolymph
How does hemolymph move through an insects body?
Through a vessel from the heart to the abdomen. Pumped through “heart” chambers in the abdomen via ostia and muscle contractions. Nutrients and wastes are exchanged between hemolymph and “heart” cells. Hemolymph goes back into vessel to be elimated from the body
Briefly describe a closed circulatory system
a system that circulates blood, keeps it under pressure, and pumps it
What is the order that blood travels through on the right side of the heart?
vena cavae, right atrium, right ventricle, pulmonary trunk, pulmonary arteries, lungs
