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HUMAN BODY SYSTEMSBlood and The Circulatory System
THE HEART
Organ made of cardiac muscle tissue.
CHAMBERS OF THE HEART The heart contains
four compartments called chambers.
The two upper chambers are called the right and left atriums.
The two lower chambers are called the right and left ventricles.
Atrium
Atrium
Ventricle
Ventricle
Pulmonary Circulation – The flow of blood through the heart to the lungs and back to the heart.
SECTIONS OF THE CIRCULATORY SYSTEM
Oxygen Poor
Blood
Oxygen Rich Blood
Picks up oxygen from the LUNGS
Oxygen Rich
Blood
DIFFUSION
Systemic Circulation – Oxygen-rich blood moves to all of your organs and body tissues, except the heart and lungs, and oxygen-poor blood returns to the heart. This is the largest of the three sections of your circulatory system.
SECTIONS OF THE CIRCULATORY SYSTEM
Oxygen Rich
Blood
Oxygen Rich Blood Gives
Oxygen to Body Cells
Oxygen Poor
Blood
DIFFUSION
BLOOD VESSELS Arteries – Blood vessels that carry blood away from
the heart. They have thick, elastic walls made of connective tissue and smooth muscle tissue.
BLOOD VESSELS
The right ventricle of the heart is connected to the pulmonary artery (moves blood toward the lungs).
The left ventricle of the heart is connected to the aorta (move blood toward other body tissues).
Did you know?Your aorta is the
about the size of a garden hose?
Atrium
Atrium
Ventricle
Ventricle
Aorta
Pulmonary Artery
BLOOD VESSELS Veins – Blood vessels that carry blood
back to the heart. Veins have one-way valves that keep blood moving toward the heart.
BLOOD VESSELS
The superior vena cava returns blood from your head and neck.
The inferior vena cava returns blood from your abdomen and lower body.
Atrium
Atrium
Ventricle
Ventricle
Aorta
Pulmonary Artery
Superior Vena Cava
Inferior Vena Cava
BLOOD VESSELS
Capillaries – Arteries and veins are connected by microscopic blood vessels. The walls of capillaries are only one cell thick. Nutrients and oxygen diffuse from body cells into capillaries.
BLOOD
Blood carries oxygen from your lungs to your body cells.
Carbon dioxide diffuses from your body cells into your blood. Your blood carries carbon dioxide to your lungs to be exhaled.
Blood carries oxygen because of a special protein called hemoglobin. Iron in hemoglobin helps it to carry the oxygen.
BLOOD
Blood is a tissue made of plasma, red and white blood cells, and platelets.
Blood is 55% plasma, 45% red blood cells, and <1% platelets and white blood cells.
RED BLOOD CELLS
Red Blood Cells
RED BLOOD CELLS
RED BLOOD CELLS
RED BLOOD CELLS
RED BLOOD CELLS
RED BLOOD CELLS
RED BLOOD CELLS
RED BLOOD CELLS
Can Receive From
Can Donate To
A
B
AB
O
BLOOD DEMOBlood group AIf you belong to the blood group A, you have A antigens on the surface of your red blood cells and B antibodies in your blood plasma.
Blood group BIf you belong to the blood group B, you have B antigens on the surface of your red blood cells and A antibodies in your blood plasma.
Blood group ABIf you belong to the blood group AB, you have both A and B antigens on the surface of your red blood cells and no A or B antibodies at all in your blood plasma.
Blood group 0If you belong to the blood group 0 (null), you have neither A or B antigens on the surface of your red blood cells but you have both A and B antibodies in your blood plasma.
