CIRCULATORY SYSTEM

FUNCTION OF THE CIRCULATORY SYSTEM Transportation maintains proper environment for cells

2 systems in the body Cardiovascular system lymphatic system

PARTS OF THE CIRCULATORY SYSTEM Blood vessels heart

BLOOD PRESSURE Force per unit exerted on the wall of a blood vessel ex.

TYPES OF BLOOD VESSELS Arteries –carry blood away from the heart veins –carry blood to the heart capillaries –smallest –where exchange occurs

RESISTANCE Opposition to the blood flow due to friction as the blood moves through the blood vessels greater the vessel’s diameter, the less the resistance blood flows faster in the center of the lumen

BLOOD FLOW THROUGH VESSELS Arteries  arterioles  capillaries   venules  veins

HEART GENERAL INFORMATION Size of your fist apex toward left hip apex rests on the diaphragm located in the thoracic cavity

STRUCTURE Pericardium Myocardium endocardium

Blood supply of the heart Heart tissue has its own blood supply Coronary circulation –left and right coronary arteries Coronary sinus Anastomoses – (a nas to MO ses)

Conduction system of the heart Handouts 1% of cardiac muscle is different. Generate action potentials in a rhythmical pattern Act as a pacemaker for the heart Ensures that cardiac chambers are stimulated to contract in a coordinated manner.

Healthy heart Factors that contribute to an unhealthy lifestyle Factors that contribute to a healthy lifestyle