Circulatory and Lymphatic System Boquet - Truc
Terms in this set (31)
What is blood made up of?
Plasma, RBC, WBC, Platelets
Red Blood Cells
erythrocytes. 1 millimeter of blood contains about 5 million red blood cells. contains hemoglobin. live & circulate for 120 days. worn out rbc's are destroyed by the liver and spleen.
an iron containing protein that binds to oxygen
white blood cells
leukocytes. there is 1 for wbc for every 700 rbc. they attack foreign substances(germs, mold). varied life spans. much larger than rbc's.
a process in which wbc eat pathogens
cell fragments that cause blood to clot. they live about 1 week
protective sac of tissue that encloses the heart
How many times does the heart contract?
72 times a minute. pumps about 70 mm of blood for each contraction.
a wall that divides the right and left sides of the heart. It prevents the mixing of oxygen-poor & oxygen-rich blood.
How many chambers does the heart have?
the right atrium & right ventricle pump oxygen-poor blood to the lungs
the left atrium & left ventricle pump oxygen-rich blood to the lungs
THE FORCE OF BLOOD ON ARTERY WALLS
the force felt in the arteries when ventricles contract (the top #)
the force felt in the arteries when the ventricles relax (the bottom number)
What are common disorders of the circulatory system?
high blood pressure, stroke, heart attack
contains a network of vessels which collect fluid that is lost by the blood. It returns this fluid to the circulatory system. the fluid is called lymph
small mass of tissue that filters pathogens (germs) from lymph. They contain specialized white blood cells called lymphocytes that "eat germs"
What is another important role that lymph nodes play in?
nutrient absorption such as fats and the fat soluble vitamins A,D,E, & K
What is the largest artery in the body?
Blood Flow Through the Heart step 1
oxygen-poor blood enters the right atrium from the superior & inferior vena cavas
BFTH step 2
It passes through the tricuspid valve into the right ventricle
BFTH step 3
Deoxygenated blood leaves the right ventricle. It passes through the pulmonary arteries & travels to the lungs
BFTH step 4
In the lungs, blood absorbs oxygen. This oxygen-rich blood travels through the pulmonary veins and enters the left atrium
BFTH step 5
From the left atrium, blood passes through the mitral valve into the left ventricle
BFTH step 6
Blood leaves the heart as it travels through the aorta.
BFTH step 7
When blood leaves the aorta, it flows into smaller blood vessels (arteries & arterioles)
BFTH step 8
Blood eventually flows through tiny capillaries. It is here that gases are diffused into tissues and blood picks up waste products
BFTH step 9 (last step)
Blood returns to the heart by way of veins