System that transports materials around the body. Circulatory System System that transports materials around the body.

VENTRICLE (blood leaves) There are two sides of each heart, a right side and a left side. Each side has two chambers: ATRIUM (Blood enters) VENTRICLE (blood leaves) LEFT SIDE Right side

Left Atrium Right Atrium Left Ventricle Right Ventricle

The Right Side Comes from body, goes to lungs                                                                                                                                                   Comes from body, goes to lungs Blood with little O2 and much CO2

The left side Blood comes from lungs and goes to body Carries less CO2 and more O2

Each chamber contains VALVES. Keep blood from flowing backwards Between atria and ventricles Between ventricles and arteries

When the left and the right side work together, it forms a continuous cycle of blood!

Fast Fact! The average heart contracts 72 times a minute, moving 70 ml each contraction. This means the average heart pumps enough blood in 1 year to fill an Olympic size swimming pool!

The heartbeat is controlled by electricity from the nervous system and hormones from the endocrine system. 2ls13747

carry blood throughout the body. Blood does not leave the vessels. Blood Vessels are ...tubes that carry blood throughout the body. Blood does not leave the vessels.

Types of Blood Vessels Arteries- carries blood away from heart. Thick walls and have a pulse. Veins- brings blood back to heart. Thin walls, but have one-way valves.

Blood Vessel Types(cont.) Capillaries- very small, thin blood vessels. Oxygen, food, wastes, and other substances pass in and out of the capillaries. Every cell in your body touches a capillary!

Arteries..flow into capillaries..flow into veins

Fast Fact! 5 liters of blood continually pump around the 60,000 miles of blood vessels in your body!

Blood, the fluid of life is really....

... a clear yellowish liquid with red particles floating in it!

If you spin a test tube of blood enough, it will separate into parts!

Parts of Blood Plasma- clear liquid part of blood. 55% of blood. Carries water, food, wastes, salt, and chemicals. Plasma

Parts of Blood Red Blood Cells- carry O2 and CO2. 43% of blood. contains hemoglobin- a protein with iron that carries the O2 and CO2. Red Blood Cells

FAST FACT! One milliliter of blood contains about 5 million red blood cells!

Parts of Blood White Blood Cells- fight infections. 1% of blood. larger cells. Platelets- start blood clotting. 1% of blood.

FAST FACT! White blood cells have a life span of a few days to a few months, and are outnumbered by RBC’s 700 to 1!