The Circulatory System Flashcards
What is the Circulatory System?
The Circulatory System is the main transport system in the human body.
What are Blood Vessels?
Blood vessels are channels that carry blood throughout your body.
What is the arteries job?
The arteries job is to carry oxygenated blood away from the heart.
What is a description of the artery?
Arteries are tough on the outside but they contain a smooth interior layer of epithelial cells that allows blood to flow easily.
What is the Capillaries job?
The capillaries job is to connect the arteries to the veins
What is a description of the Capillaries?
The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart.
What is the veins job?
The veins job is to carry deoxygenated blood back to the heart.
What is a description of the veins?
Veins are like arteries but not as strong or as thick. Unlike
arteries, veins contain valves that ensure blood flows in only one direction.
Why doesn’t arteries require valves?
Arteries don’t require valves because pressure from the heart is so strong that blood is only able to flow in one direction.
What is the Structure and Function of the Blood Vessels?
Blood is transported inarteries,veinsandcapillaries.
Blood is pumped from the heart in the arteries then it is returned to the heart in the veins.
The capillaries connect the two types of blood vessel and molecules are exchanged between the blood and the cells across their walls
The Arteries?
Carries blood under high pressure
Have thick muscular and elastic walls to pump and accommodate blood
Always carries blood away from the heart
Carry oxygenated blood, except for the pulmonary artery
Has a type of supporting tissue called connective tissue which provides strength
Has a narrow lumen
The Veins?
Carries blood under low or negative pressure
Has thin, less muscular than arteries.
Always carries blood to the heart
Always carries deoxygenated blood, except for the pulmonary vein.
Has less connective tissue than arteries.
Has a wide Lumen
What is the Lumen?
The Lumen is the channel inside the blood vessel that carries the blood
What is the Heart primarily responsible for?
The heart is primarily responsible for pumping blood and distributing oxygen and nutrients throughout the body.
Why is the circulatory system the most important?
The circulatory system does a very important job in your body.It carries oxygen and essential nutrients to all cells around the body in arteries and carries the waste products and carbon dioxide in veins. The average human body contains over 60,000 miles of blood vessels.