Cardiovascular

Separates R and L ventricles of heart

Gathers deoxygenated blood from body.

Gathers reoxygenated blood from lungs

Pumps deoxygenated blood to lungs

Pumps reoxygenated blood to body

• Cardiac Muscle
• -Adult fist, 300 grams or 10 ounces
• -myofibrils containing actin and myosin. Surrounded by sarcolemma.

• -Shorter and more tightly connected than skeletal muscles
• -Have built in contraction rhythm. Fibers with highest rhythm determine heart rate.
• (Aver. 70-80 min)

• -Sinoatrial Node in R Atrium=Pacemaker-initiates beat
• -Atrioventricular Node receives and delays impulse and then passes on to ventricles

Space in chest between lungs containing containing all internal organs except lungs

Separates R and L ventricles

• Amount of blood pumped out each contraction of a ventricle
• -Adult, 75 to 80 ml per beat

Combination of bpm and stroke volume

• -Transports:
• O2 and nutrients to tissue
• Waste products from tissue
• Hormones to organs and tissue
• Heat throughout body
• -Regulates body temp and acid balance (ph) in body
• -Protects:
• Body from excessive bleeding by clotting
• Contains specialized immune cells to help fight disease and sickness (can also spread disease)

• -8% of total body weight
• -5L (1.5 Gal)

• -Large and elastic
• -At points leaving heart
• -Branch out into medium sized muscle arteries

Small terminal branches of arteries

• Smallest blood vessel
• -where O2, nutrients, hormones, and waste exchange with tissue

Collect blood from capillaries to send to heart for cleaning

-Merge with other venules to form veins

Transport blood from venules to heart