CIRCULATORY SYSTEM AND BLOOD

A Presentation Brought by Meredith B. , Zachary S., Trace T.,

Samantha L.

Definitions Circulatory system – Blood flowing from the

heart to all of the parts of the body Artery- a blood vessel that carries blood

away from the heart to organs and cells Capillary – a tiny blood vessel that allows

nutrients, oxygen, and other substances to body cells and take carbon dioxide and other wastes from body cells

Vein- a blood vessel that carries blood to the heart from the body organs to collect oxygen

Definitions (Continued) Cardiovascular system- a collection of

organs that transports blood throughout the body

Heart- an organ made up of mostly cardiac muscle tissue

Blood- a connective tissue made up of plasma, red blood cells, platelets, and white blood cells. Blood transports oxygen and nutrients to the body.

Background History About 3,600 years ago, Egyptian doctors had thought

that vessels went from the heart to all parts of your body.

Ancient Egyptians thought the heart was where a persons thoughts and feelings are.

3,000 years ago, Chinese doctors had written that the heart controlled the flow of blood through blood vessels

They also had thought that other substances like urine and air traveled through the blood vessels

In the 5th century, Greek scientists thought that a special kind of air flowed through the vessels and was the spirit of life

How It WorksI. The heart pumps oxygen rich blood from the

left ventricle into arteries and then into capillaries.

II. As blood travels through capillaries it transports oxygen, nutrients, and water to body cells, while taking out wastes, as well as Carbon Dioxide.

III. Oxygen poor blood travels back to the heart and enters through the right atrium.

Blood Facts 7% of all human weight is made of blood. Red Blood Cells are made in bone marrow

and circulate in the body for around 120 days.

Blood delivers important substances to human cells and helps take away unwanted blood products.

Some humans donate blood annually for medical purposes, such as blood transfusion and are made into medicines.

Dangers of Blood Smoking, high levels of cholesterol,

stress, physical inactivity, or heredity Heart diseases are the leading cause of

death in the United States.

The Human Heart The human heart is shaped like a pear, and

is about the size of your fist. It is responsible for supplying the body with

oxygen rich blood. Blood pressure is extremely important to the

organism, as the pressure must always be controlled. High or low blood pressure is considered a threat to the system of said organism.

It may be controlled by medicine, proper exercise, and a healthy diet.

Heart Composition The heart is made up of a muscle known

as myocardium. The myocardium is enclosed in a double-layered membrane called the pericardium.

The location of the heart lies between the rib cage and lungs.

The heart is made up of four chambers, respectively, with many large arteries and veins. The two upper chambers, called atriums are accompanied by two lower chambers called ventricles.

Blood Cells Red Blood Cells, White Blood Cells, and

Platelets are three kinds of blood cells that add up to 45% of the blood tissue, by volume, with the remaining 55% of the volume composed of plasma, the liquid component of blood.

Red Blood Cells carry oxygen and carbon dioxide, through hemoglobin. Red Blood Cells go through a monopotent stem cell change.

Parts! Blood vessels Heart Arteries Veins Capillaries Atrium (right and left) Ventricle blood (plasma) Red blood cells Platelets White blood cells

Parts Pictures!

More Pictures!

How the Heart Works

THE END!