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Structure of the Circulatory System (Blood Vessel (Artery (Direction of…
Structure of the Circulatory System
Blood Vessel
Artery
Direction of blood flow:
The blood moves away from the heart
Thickness :
The thickest branch of blood vessels.
Blood type :
Oxygnated blood
Artery --> arterioles --> capillaries --> veiuules --> veius
Structure
: (inner->outer) 1-endothelium 2- Smooth muscle 3- Connective Tissue
Veins:
Blood type:
CO2 rich blood.
Direction of blood flow:
to the heart
Structure:
(outer->inner) 1: Connective tissue 2: Smooth Muscle 3: Endothelium.
Veins --> veinules --> capillaries.
Thickness:
Slightly less thicker than arteries.
Capillaries:
Direction of blood flow:
connects the veins and arteries.
Responsible for substance exchange and waste.
A single cell thick walls; easier for the diffusion process.
The diameter of blood vessels changes in response to the needs of the body.
Blood type:
Oxygenated blood.
Heart
Blood flow:
Right atrium
Then moves to the right ventricle
To the lungs
(gas exchange occurs in lungs)
Then it turns to oxygenated blood
Then moves to the left atrium
Then to the left ventrical
made of
4 chambers
separated by septum
2 Atrias; left and right
2 Ventricles; left and right
The right and left side of the heart is divided by a
septum
.
Is a hollow muscular organ made up of cardiac muscle (involuntary) which pumps,
de-oxygenated blood to lungs.
oxygenated blood to body.
Blood
Sara Alsaleh - Sara Aljarboa - Alanoud - Danah
