How does the Circulatory System maintain -It supplies cells throughout the body with oxygen and nutrients while also ridding them of wastes. Transports materials such as: (to cells) (to attack foreign substances) (chemical messengers) (to lungs) (to cells)
The Circulatory System Consists of: The Heart Blood Vessels Blood
(Basic Pathways): Pathway that pumps blood from the heart to the lungs and back to the heart.(gases exchanged O2/CO2) Pathway that pumps blood from the heart to the body and back to the heart. (Nutrients, oxygen, and wastes exchanged)
Characteristic: -Thick, muscular, elastic -Under pressure Function: -Carry blood AWAY from the heart -Carry Oxygen-rich blood Arteries are the THICKEST blood vessel
Characteristic: -Thin-walled and flat -Contain one-way valves to prevent backflow Function: -Carry blood TOWARD the heart -Carry Oxygen-poor blood Characteristic: -Smallest blood vessel (walls only 1 cell thick Function: -Exchange of gases, nutrients, and wastes takes Place here. (Diffusion)
-You have about 5.6 L of blood What is blood? -Liquid tissue of transport -Carries, gases, wastes, hormones, and enzymes -Consists of cells Suspended in a liquid: PLASMA
(Components) Red Blood Cells (RBC): Characteristics: -Most abundant blood cell (highest in #) -Carry O2 and CO2 (due to hemoglobinthe oxygen-carrying protein that gives blood it s red color) White Blood Cells (WBC): WHITE BLOOD CELLS -have no nucleus Function: Characteristics: -Have large nucleus Function: -Fight infection (Some Engulf and destroy others produce antibodies
Platelets Characteristics: -Cell fragments (contain no nuclei) Function: -Responsible for blood clotting PLATLETS Plasma plasmsa Characteristics: -Liquid part of blood (90% H2O, 10% gases, salts, Nutrients, hormones, wastes, And proteins) Function: -Transports materials
-Upper Chambers (Smallest)-Receive Blood -Lower Chambers (Larger) -Pump out blood Septum- Thick wall that separates left side of the heart from right side
Pulmonary Artery: Pulmonary Vein: Carries oxygen-poor blood to lungs Carries oxygen-rich blood to the heart from the lungs Vena Cava: Aorta: (Largest Artery) Brings oxygen-poor blood to heart from the body Carries oxygen-rich blood from the heart to the body Valves between chambers prevent backflow!!
Oxygen Rich Blood Oxygen-Poor Blood
Vena Cava Aorta Pulmonary Artery Pulmonary Vein Right Atrium Left Atrium Left Ventricle Right Ventricle Septum Vena Cava Aorta
Lub: The valves between the atria and ventricles close Dub: The blood leaves ventricles and the valves close behind
Normal BP= 120/80 Over 140/90 =HIGH!!! Contractions = Pulse Blood Pressure = The force of the blood on the artery walls Systolic- Force felt when ventricles contract pushing blood into arteries (Top #) Diastolic-Force felt when ventricles relax and atria fill with blood (Bottom #)
Symptoms: Nausea, shortness of breath, severe crushing chest pain How does muscle tissue die? -Arteries that supply tissue get blocked affecting Blood supply. Nutrients and O2 not circulating; Wastes not removed Tissue dies! -artery leading to heart is blocked causing tissue to die Caused by: poor diet,stress, lack of exercise, genetics,smoking Treatment: Change habits, exercise, surgery
-Fatty deposits build up on artery walls reducing elasticity and restricting blood flow Caused by: High cholesterol, smoking, poor diet Treatment: surgery to widen arteries (procedure called an angioplast), change habits Long Term Effects: Can lead to heart attack
-Artery in brain becomes blocked, causing brain Cells to die Caused by: Poor diet, smoking, lack of exercise Treatment: Physical therapy, surgery, change habits Long Term Effects: May cause paralysis, loss of speech, or death
How do the Circulatory System and Excretory System work together????????? -Excretory System removes metabolic wastes; Circulatory system transports waste from cells to excretory organs How do the Circulatory System and Respiratory System work together????????? -Respiratory System responsible for gas Exchange; Circulatory System transports gases to cells How do the Circulatory System and Digestive System work together????????? -Digestive System breaks down food; Circulatory System transports nutrients to cells
If Circulatory system Malfunctions: -Gases may not be transported to Cells (Respiratory System affected) -Nutrients may not be delivered to cells (Digestive System affected) -Wastes may not be transported from cells (Excretory System affected) Body Systems are
The aorta, the largest artery in the body, is almost the diameter of a garden hose. Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair.
Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute. In one day, the blood travels a total of 19,000 km (12,000 miles)--that's four times the distance across the US from coast to coast.
The heart pumps about1 million barrels of blood during an average lifetime--that's enough to fill more than 3 super tankers.
Your heart beats about 100,000 times in one day and about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times.