The CIRCULATORY SYSTEM

CirculationYour body

resembles a large roadmap, There are routes or “blood vessels” that take you downtown to the “heart” of the city.

3 Major Parts of the Circulatory system

• Blood – circulatory fluid - carries important “ *stuff ” through body

• Blood Vessels – transports blood throughout the body (like roads in a city)

• Heart – pumps (beats) to push blood through the blood vessels

* Stuff – includes like oxygen, nutrients, & waste products CO2

1. Your Blood is made of:

• Plasma– Liquid part of blood

• Red Blood Cells

– They carry oxygen to all parts of the body

• White Blood Cells–Fight and kill

germs that may enter your bloodstream

• Platelets–Form “scabs”

when you cut yourself

–Helps stop the bleeding

2. Blood Vessels : are like One Way Streets

• Blood Vessels resemble very long and skinny tunnels that are found all throughout your body.

3 Types of Blood Vessels

Arteries Capillaries Veins

* Click on each blood vessel to explore its function in circulation

3. The Heart

–4 chambers ( or compartments )• 2 upper chambers : Left Atrium

Right Atrium

• 2 lower chambers : Left Ventricle

Right Ventricle

• We are amazing on the inside as well as the outside. These

wax models were made in the 19th Century to teach surgeons and medical students human anatomy and physiology. They are now viewed by the millions in the Medical Science Wing of Vienna's great Natural History museum. The heart you see is surrounded by the lungs and underneath is the diaphragm.

We are amazing on the inside as well as the outside. These wax models were made in the 19th Century to teach surgeons and medical students and we can be glad they had them. They are now viewed by the millions in the Medical Science Wing of Vienna's great Natural History museum. The heart you see is surronded by the lungs and underneath is the diaphram. The big red tube sticking up is the venacava and the tube with the stripes is the aorta. Luckily my spouse is a doctor and helps me name the parts right. It fasninating to see these up close and reminds me how fragile and complex are bodies are. Take care of that heart you need to do lots of loving with it. Blessings. 

Human heart is about the size of a fist

Right atrium

Left atrium

Right ventricle

Left ventricle

Heart – Exterior View

Inside the HeartHeart – internal view

Blood Flow through the Heart

Blood with little oxygen is pumped from the Right Atrium through a valve Right Ventricle through a valve Pulmonary Artery.

The Pulmonary Artery sends it to the Lungs to pick up Oxygen. Blood returns to the heart through the pulmonary veins.

Pulmonary veins carries oxygen-rich blood Left Atrium through a valve Left Ventricle through a valve Aorta.

The Aorta is a series of branches that sends oxygenated blood throughout the body.

Right atrium

Right ventricle

Left atrium

Left ventricle

aorta

Pulmonary artery

Lub LISTEN to your

heartbeat- it makes a lub dub

sound.

The lub is when blood is pushed out of the

heart into the body and the dub is the reloading of the heart with more blood ready to push it

out to the body

Watch the animation – click the link

Dub

http://www.youtube.com/watch?v=71olG7fyOCI