Cardiovascular System

by: Courtney Davis

Structures & Functions

Structures : the heart , blood vessels , arteries , The veins , The capillaries .

Functions : These maintain the bloods circulation throughout the body. The structure of these different vessels within the cardiovascular system are determined by their functions and the pressure of the blood traveling through them. Blooding flowing through arteries appears bright red due to being oxygenated.

The Heart

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Veins

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Capillaries

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Tracing the blood flow

- blood enters through to large veins ( the inferior and superior vena cava,)

- putting oxygen - poor blood into the right atrium heart , blood then flows to the right ventricle and then to the rest of the veins in the body .

Types of blood vessels

THREE MAIN TYPES OF BLOOD VESSELS

The arteries - carries blood away from the heart .

The capillaries - enables water exchange between the blood , tissues and veins .

the veins - Carries blood from the capillaries back to the heart .

An Artery

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Blood cell formation

Red blood cells and most white blood cells , and platelets are produced in the bone marrow .Bone marrow is the spongy tissue that fills the cavities inside your bones. Most of your blood cells are made in your bone marrow. This is called hematopoiesis .

Human Blood Groups

The blood of different people varies as it contains different molecules of protein called antigens and antibodies. The antigen protein molecules are found on the surface of red blood cells and antibodies are in the blood plasma. Antigens and antibodies vary between blood types. Due to variations in antibodies people have A, AB, B and O blood groups. Due to variations in the antigens blood is either Rh positive or Rh negative.

Cardiovascular diseases and disorders

myocardial infarction - formally known as a heart attack is a blockage of the blood flow to the heart .

Mitral Valve Prolapse - Closure of the valve between the heart's lower and upper left chambers .

varicose veins - enlarged veins

Arteriosclerosis - the build up of fats , cholesterol , and other substances in the artery walls .