Download Circulation ppt

Circulation and Respiration
Supplying Oxygen to the body
through the bloodstream
Blood Vessels
• Blood vessels carry blood from your heart
to all of your body parts, and then back
again.
• Blood vessel walls consist of muscle
tissue and connective tissue that enable it
to expand and contract as blood flows
through it.
• Red blood cells inside the vessel carry
oxygen to all parts of your body.
Circulatory System
• Together, the organs of the circulatory
system supply nutrients and oxygen to
your body
• They remove waste products that would
be harmful to your health if they were not
removed
Heart
• The human heart is the primary organ of
the circulatory system
• It is a 4-chambered organ
• Blood is actually a type of connective
tissue that circulates throughout the body
carrying nutrients and oxygen
Blood Vessels
• Arteries – Blood vessels that carry blood away
from the heart
– This blood can be going to the lungs
– Or to the body organs
• Veins – Carry blood to the heart
– From the lungs
– From the body organs
• Capillaries –Tiny blood vessels that allow for
diffusion of oxygen and nutrients between the
arteries and veins
Blood Vessels
Heart and Blood Flow
• pulmonary circuit
carries oxygen-poor
blood from the heart to
the lungs and oxygenrich blood back to the
heart.
• In the lungs the blood
picks up oxygen which
is used by the body
organs
Systemic Circuit
• The Systemic circuit
takes the oxygen rich
blood TO the body
organs and returns the
oxygen depleted blood
back to the heart
• The blood is then
brought back to the
lungs (by the pulmonary
system) to get oxygen
Structures of the Heart
High Oxygen Heart Structures
• Aorta – Carries Blood to the rest of the body
• Left Atrium – Oxygen-rich blood enters the left
atrium through the pulmonary veins
– Blood passes through the atrioventricular valves to
the Left ventricle
• Left Ventricle- Made of thick cardiac muscle is
the pump. This chamber pumps oxygen-rich
blood to the body through the aorta
Low Oxygen Side of the Heart
• Right Atrium – Oxygen-poor blood enters the
right atrium from the body organs through the
upper and lower vena cava (veins)
– Blood passes through the right atrioventricular valves
to the right ventricle
• Right Ventricle –Blood is sent to the lungs
through the pulmonary arteries
• pulmonary Arteries carry oxygen-poor blood
back to the lungs
Blood Pressure
• Systolic pressure measures the pressure
of the heart when it is pumping blood
• Diastolic pressure is the pressure of the
heart “at rest” or taking in blood
– Normal blood pressure is below 130/85