Presentation on theme: "Circulatory Excretory System By:Knox PURPOSE Move blood, nutrients throughout the body. Filters Composed of Heart Vessels (vascular) Kidneys Skin Lymphatic."— Presentation transcript:
PURPOSE Move blood, nutrients throughout the body. Filters Composed of Heart Vessels (vascular) Kidneys Skin Lymphatic system
To Know for Test Function- circulatory/excretory system Heart structures- venae cavae (superior, inferior), pulmonary arteries, pulmonary veins, aorta, atrioventricular valves, aortic valve, pulmonary valve, atrium, ventricles. Flow of blood in heart and body (arrows) Function of major blood vessels. (location of flow through out the body) Systemic system, Pulmonary system Normal blood pressure- what #’s mean? Major organs- circulatory & excretory system
http://science.howstuffworks.com/heart2.ht m Blood flow in body.http://science.howstuffworks.com/heart2.ht m http://answers.google.com/answers/thread view?id=463638 Blood replacement time?http://answers.google.com/answers/thread view?id=463638
Carry blood AWAY from the heart. Arteries withstand high pressure-thick Arteries carry oxygen rich blood. except for pulmonary arteries,
Carry blood BACK to heart.Carry blood BACK to heart. Blood flowing through veins gets pushed from contractions of skeletal muscles.Blood flowing through veins gets pushed from contractions of skeletal muscles. Valves do not allow blood to back up.Valves do not allow blood to back up.
Fact If you stretch out all the veins, arteries, capillaries, and blood vessels it would be 50- 100,000 miles, almost 1/3-1/2 the distance to the moon.If you stretch out all the veins, arteries, capillaries, and blood vessels it would be 50- 100,000 miles, almost 1/3-1/2 the distance to the moon.
The Heart Hollow, muscular organ Contracts at regular intervals approx 72 beats/min. Circulates blood
The Heart Enclosed in protective sac-pericardium Thought as two pumps side by side Size of fist- grows as fist grows.
Atria- receive blood- TOP Ventricles - pump out blood BOTTOM
On Test! Structure Atrioventricular valves Inferior/lower Vena Cava Superior/upper Vena Cava Right Pulmonary Arteries Right Pulmonary Left Pulmonary veins Left Ascending Descending Aorta
Red- Oxygenated blood Left Side Receives oxygen blood from lungs- Pulmonary vein atrium ventricle Contractions force blood from ventricle into Aorta Sends blood to body, up & down Blue- Deoxygenated blood
Right Side Heart relaxes -pressure forces blood into atrium Receives blood (Vena cava) Superior VC -upper body Inferior VC- lower body Heart contracts -blood squeezed into ventricle Blood forced into lungs- Pulmonary artery.
Size- Females 9.5 ounces, males 10.5 (men have larger bodies) The average adult beats 70 times/min Heart pumps roughly all blood- every minute Average human 5-6 quarts of blood.
Heart beats approx. 38 million times/year = 700,000 gallons of blood Olympic pool = 650,000 gallons By 70 years old, on average, it beats 2.5 billion times! = 48 million gallons! Heart weighs less than ¾ pound, size of fist!!!!
oHeartbeat starts right atrium in a small group of cells- nickname “pacemaker” oPacemaker contracts, send signals to left and right atrium, which then contracts oNext the right and left ventricle contracts oVentricles force blood out. http://science.howstuffworks.com/heart3.htm
Blood Pressure Blood Pressure- measure of force blood exerts against vessel walls. Autonomic nervous system regulates Systolic- beats, blood out <120 Diastolic- rests, blood flows in <80 120 80
What do the numbers mean? Smaller opening = higher pressure (spraying garden hose with finger over opening- less water comes out!) Systolic (1/3 cycle)- Heart beating- High- chances increase for heart problems all ages- especially older Diastolic (2/3 cycle) - Heart resting-High- good predictor heart attack for young adults & all ages Wide spread between both #’s = not good!
American Heart Association recommended blood pressure levels Blood pressureSystolic (mm/Hg) Diastolic (mm/Hg) NormalLESS than 120LESS than 80 Prehypertension120–13980–89 High Stage 1140–15990–99 Stage 2160 or higher100 or higher
Why High Pressure Bad? Think of a garden hose that is clogged, constant/continuous HIGH water pressure could blow out the hose, same for blood vessels, plus the heart has to work more, weakens the heart. Weak area, could burst
To Know for Test Function- circulatory/excretory system Heart structures- venae cavae (superior, inferior), pulmonary arteries, pulmonary vein, aorta, atrioventricular valves, aortic valve, pulmonary valve, atrium, ventricles. Flow of blood in heart and body (arrows) Function of major blood vessels. (flow through out the body) Systemic system, Pulmonary system Normal blood pressure- what #’s mean? Major organs- circulatory & excretory system
Your consent to our cookies if you continue to use this website.