Formed Elements The cells in blood are called

Formed Elements (The cells in blood are called formed elements) Plasma (Plasma is mostly water) Composition Of Blood 1 2 Erythrocytes (RBC’s_) Leukocytes (WBC’s) 3 Platelets 4 5

Heart 200 mm. Hg 1 Aorta 2 Artery 120 mm. Hg 3 Arteriole 4 Capillary Bed 50 mm. Hg Venule 5 Vein 6 Vena Cava Heart 7

Differences Between Arteries and Veins toward • Veins transport blood _______ from the heart low pressure vessels • Veins are _____ valves • Veins have ______

Normal Blood Pressure • Systolic Pressure ventricular contraction – Maximum pressure during_______ • Diastolic Pressure ventricular relaxation – Minimum pressure during _______ • Textbook Values: SP DP 120 mm. Hg (Systolic) 80 mm. Hg (Diastolic)

Ruptured blood vessels in the retina associated with hypertension High Blood Pressure Hypertension = ________

The Sinoatrial Node (S. A. Node) What is the function of the atrio-ventricular node? It is an electrical connection between the atria an the ventricles with a 7/100 second delay to allow the atria to empty before the ventricles begin to contract. Impulse causes atrial contraction __________ Arial contraction is forces the__________ blood from the atria to flow into the ventricles

The Cardiac Cycle 7/100 second delay does what? It lets the atria completely empty before the ventricles begin to contract QRS complex QRS – complex R P-wave T- wave QS Atrial emptying Ventricular filling