COMPONENTS OF THE CIRCULATORY SYSTEM
1. BLOOD VESSELS
- Blood vessels form a network of tubes carrying blood between the heart, body cells and
tissues. These tubes are an essential element of the circulatory system because they
provide an environment in which blood cells can perform their function.
- There are three types of blood vessels:
a. Arteries
b. Veins and
c. Capillaries.
The blood vessels and the heart are lined with a single layer of cells called endothelium.
COMPARE THE STRUCTURE OF ARTERIES CAPILLARIES AND VEIN
The function of arteries and veins is to carry blood over relatively long distances from one organ
to another, whereas capillaries form branching networks to carry blood over relatively short
distances within organs. Arteries carry blood away from the heart; veins carry blood from the
tissues and return it to the heart. All three have a similar structure, however it differs in terms
of the layers of tissue in the walls of each along with the size of the lumen – each vessel is
structurally modified such that is best carries out its transport function.
ARTERIES
Carry oxygenated blood under high pressure from the heart.
An exception is the pulmonary artery which carries deoxygenated blood to the lungs
1. BLOOD VESSELS
- Blood vessels form a network of tubes carrying blood between the heart, body cells and
tissues. These tubes are an essential element of the circulatory system because they
provide an environment in which blood cells can perform their function.
- There are three types of blood vessels:
a. Arteries
b. Veins and
c. Capillaries.
The blood vessels and the heart are lined with a single layer of cells called endothelium.
COMPARE THE STRUCTURE OF ARTERIES CAPILLARIES AND VEIN
The function of arteries and veins is to carry blood over relatively long distances from one organ
to another, whereas capillaries form branching networks to carry blood over relatively short
distances within organs. Arteries carry blood away from the heart; veins carry blood from the
tissues and return it to the heart. All three have a similar structure, however it differs in terms
of the layers of tissue in the walls of each along with the size of the lumen – each vessel is
structurally modified such that is best carries out its transport function.
ARTERIES
Carry oxygenated blood under high pressure from the heart.
An exception is the pulmonary artery which carries deoxygenated blood to the lungs
