DO NOW Describe the structures and functions of the blood’s components.
REGENTS REVIEW The diagram below shows a cell in the human body engulfing a bacterial cell. The cell labeled X is most likely a1. red blood cell2. white blood cell3. liver cell4. nerve cell
Objective:How do thediseases ofthe circulatorysystemprevent themaintenanceofhomeostasis?
SIGNS OF CIRCULATORY DISEASE Most significant ef fects seen in the brain or the heart Tissues in these organs die without oxygen
COMMON DISEASES OF CIRCULATORY SYSTEM1. Heart disease Leading cause of death in the United States2. Stroke Brain tissue death3. High blood pressure People with high blood pressure are at risk for heart disease and stroke
HEART DISEASE Heart muscle requires constant oxygen supply Provided by just two coronary arteries and branches The most common cause of heart disease is caused when blood flow in these is obstructedCardiovascular disease is another term for heart disease*
HEART DISEASEATHEROSCLEROSIS Fat deposits called PLAQUE build up on artery walls Eventually cause arteries to stiffen Can cause flow of blood to be obstructed Cause: Build up by eating fatty foods, high in saturated fat, or lots of cholesterol
HEART DISEASE LEADING TO HEART ATTACK If the plaque ruptures, blood clot may form and block artery Blocked vessels don’t get the oxygen needed and can lead to damaged or dead tissues Heart attacks are when heart cells are damaged or die HEART FAILURE can result – heart stops Cocaine, cigarette smoking, atherosclerosis can lead to heart attacks
REGENTS REVIEW High blood pressure can usually be reduced if a person1. Eats a diet high in salt and reduces physical activity2. Eats a diet high in saturated fats and reduces stress3. Reduces physical activity and decreases the consumption of complex carbohydrates4. Exercises regularly and lowers the amount of saturated fats consumed
STROKE Sudden death of brain cells when blood supply is interrupted Can be caused in two ways: 1. Blood clot blocks a blood vessel in the brain 2. Week blood vessel breaks and bleeds into the brain
STROKE Symptoms of a stroke: 1. Headache 2. Numbness 3. Dizziness 4. Confusion 5. Trouble speaking Results of a stroke depend on location in the brain
HIGH BLOOD PRESSURE Also known as HYPERTENSION Blood pressure greater than 140/90 Heart struggles to push blood through vessels Major strain on the heart
HIGH BLOOD PRESSURE Can cause small tears in blood vessels atherosclerosis Stif fened arteries can lead to high blood pressure Diet, exercise, and prescription drugs can help control HBPIf gone untreated, can lead to heart attack, stroke, kidney damage
NAPPY’S REVIEW A blockage in the carotid arteries – the arteries that supply the brain with blood – if obstructed long enough, can result in1. Stroke2. Heart disease3. High blood pressure4. The silly willys
REGENTS REVIEW Which organic compounds are needed for the synthesis of the plasma membrane, contain a large amount of stored energy and have been linked to cardiovascular disease?1. Complex carbs2. Saturated fats3. Simple sugars4. Polyunsaturated fats