Download Circulatory/Respiratory

Circulatory/R
espiratory
System
What makes up the
circulatory system?
 Heart
 Blood
 Blood Vessels
 Function: Transportation system by which oxygen and
nutrients reach the body’s cells, and waste materials
away are carried away
The heart, the lungs, and the blood
vessels work together to form the
circle part of the circulatory system.
The Heart
 An organ made of cardiac muscle
 Size of your fist and in the center of your chest
 Valves are located between the artia and ventricles and these
valves close to prevent backflow. “LUB DUB” sound
 Right side  pumps deoxygenated blood to the lungs
 Left Side  Pumps oxygenated blood to the body
Blood Vessels
Hollow tubes that circulate your blood
all throughout your body
- Arteries
- Veins
- Capillaries
Arteries
 Carry blood AWAY from the heart
 Main artery called the aorta
 Aorta divides and branches
 Many smaller arteries
 Each region of your body has systems of arteries
supplying it with fresh, oxygen-rich blood
Arteries
 Have a strong, muscular walls, and are very thick
 The inner layer is very smooth so that blood can flow
easily.
Capillaries
 Allows food and oxygen to be released to the body
cells
 Carbon dioxide and other waster products returned to
the bloodstream
 It is where exchanges occur
Capillaries
 Very Thin
 Only one cell thick
 Connect arteries & veins
Arteries  Capillaries  Veins
Veins
 Carry blood to the heart
 Receive blood from the capillaries
 Transport waste-rich/oxygen-poor blood back to the
lungs and heart
 Valves are located inside the veins to allow blood to
move in one direction
 Veins are a medium thickness
 Valves are located inside the veins
 The valves only allow blood to move in one direction
Blood
 Blood vessels are made up of plasma, red blood cells,
platelets, and white blood cells
 Function: Carries oxygen and nutrients to all parts of
your body.
Plasma
 Yellowish liquid
 Transport nutrients
and blood cells
 Made is made in the
liver
Red Blood Cells
 Transport oxygen
throughout the body (O2)
 Makes blood red
White Blood Cells
 Protects the body against
germs and foreign
invaders
 Attacks and destroys
germs that enter germs
Platelets
 Blood cells that help spot
bleeding by forming clots
and scabs