Blood Pressure Blood Volume

Exercise

-- Force on vessel walls. due to ventricle contraction and elasticity of vessels-- Written as a fraction of systole (ventricle squeeze) over diastole (ventricle fill).-- Increased by emotional state and exercise.-- Hearts which are more fit have lower pressure-- 120/80 male or 110/70 female are normal-- Regulated by cardiovascular center in medulla as part of the autonomic system.

-- A friction force that slows down blood flow.-- The walls of the blood vessel create friction-- Skinnier vessels touch more of the blood in them-- Longer vessels touch more of the blood in them-- Blood with less fluid has more resistance-compare toothpaste to water

Resistance

-- Stroke volume is amount of blood leaving heart every beat-- SV is affected by amount of blood in ventricle, force of contraction, and resistance in vessels-- Cardiac Output is how much blood leaves heart in one minute.-- Resting male average is 5.25L/min-- 5.25L is average amount of blood in a person-- Regulated by cardiovascular center in medulla as part of the autonomic system.

--Hypertension-higher than normal blood pressure--Hypertension causes atherosclerotic vascular disease (plaque buildup), heart failure, kidney disease, and stroke--Arteriosclerosis-stiff walls--Bad for health: smoking, saturated fat, lack of exercise, stress--Good for health: Not overweight, no smoking, exercise, fruits, and vegetables--Treatment: angioplasty, artery replacement

Disease

-- Increase in exercise may increase cardiac output by 6 times to 30L/min!--Higher activity, higher blood flow

Blood Pressure

Book

Viscosity

Heart and Vessels

-- Right side of heart pumps deoxygenated blood to lungs-Pulmonary circuit--Left side of heart pumps oxygenated blood to body-Systemic circuit--Arteries leave heart so have to be stronger, thicker--Smaller arteries--arterioles --Veins go to heart, low pressure so need valves--Smaller veins--venules--Capillaries to every cell in body--1 cell thick

Blood Volume

Medline

Calculator

Diameter

Sickle Cell

--how thick and slow

Benefits

3 Min

Comparison

Aging

Surgery

Worksheets Quizzes

Concepts

Worksheets

Viscosity

15 Minutes

8 Minutes

Lesson plan, slides,worksheets:Paperclip at bottom of page.

2 Systems

Song

Circulation

Bill Nye

Vessel Size

11 Min

High BP

16 Q

Label

Pulse

Blood Pressure, Blood Volume, Resistance, Disease, and Exercise

Blood Pressure, Blood Volume, Resistance, Disease, and Exercise