The Cardiovascular System and Components of Blood
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37 Terms
oxygen, nutrients, water, hormones, and WBC
What does blood deliver to each cell?
waste
What does blood remove from each cell?
heart
a pump made of cardiac muscle
heart
pumps blood to the body cells and the lungs
heart
beats approximately 72 beats per minute
heart
made of 4 chambers
blood
made of cells and plasma
blood
functions: transportation (RBCs and Plasma), fight infection (WBCs), and clot blood (platelets)
blood vessels
3 main types
arteries
carry oxygenated blood away from the heart to the body cells
capillaries
tiny blood vessels that connect arteries and veins at the body cells
veins
carry deoxygenated blood back to the heart from the body cells
thrombocytes
platelets
thrombocytes
< 1 % of blood volume
thrombocytes
not true cells- only cell fragments
thrombocytes
help to clot damaged blood vessels (called hemostasis)
leukocytes
white blood cells
leukocytes
< 1 % of blood volume
leukocytes
true cells
leukocytes
life span 1-3 days
leukocytes
defense against disease
leukocytes
5 main types
plasma
non-cellular
plasma
blood’s liquid matrix
plasma
55% of blood volume
plasma
90% water
plasma
10% solutes: gases, nutrients, proteins, electrolytes, hormones
erythrocytes
red-blood cells
erythrocytes
45% of blood volume
erythrocytes
hematocrit: the % of blood made up by erythrocytes; higher in males
erythrocytes
not true cells - lack nuclei and organelles
erythrocytes
biconcave discs
erythrocytes
transport oxygen from the lungs to the body cells
erythrocytes
each RBC contains 250 million hemoglobin molecules
hemoglobin
protein that uses iron to bind 4 oxygen
erythrocytes
produced by erythropoiesis in the red bone marrow
erythrocytes
lifespan: 120 days