Post on 28-Dec-2015
30.4 Blood Vessels and Transport
Arteries, veins, and capillaries transport blood to all parts of the body.
30.4 Blood Vessels and Transport
Arteries carry blood away from the heart.– blood under great pressure– thicker, more muscular walls
ARTERYVEIN
CAPILLARIES
arteriole venule
endothelium
connective tissue
smooth musclevalve
30.4 Blood Vessels and Transport
Veins carry blood back to the heart.
– blood under less pressure– thinner walls, larger diameter– valves prevent backflow
ARTERYVEIN
CAPILLARIES
arteriole venule
endothelium
connective tissue
smooth musclevalve
30.4 Blood Vessels and Transport
Capillaries move blood between veins, arteries, and cells.
ARTERYVEIN
CAPILLARIES
arteriole
endothelium
connective tissue
smooth muscle
venule
valve
30.4 Blood Vessels and Transport
Blood Components– plasma– red blood cells – white blood cells – platelets
red blood cells,white blood cells,and platelets
plasma
* Blood transports materials
30.4 Blood Vessels and Transport
Plasma
– 55% of Blood– molecules diffuse into
and out of it– contains proteins and
clotting factors– ~90 % water
30.4 Blood Vessels and Transport
Red blood cells
– transport oxygen to cells and carry away carbon dioxide– have no nuclei and contain hemoglobin
30.4 Blood Vessels and Transport
White Blood Cells
fight pathogens and destroy foreign matter.
red blood cell
platelet
white blood cell
30.4 Blood Vessels and Transport
Platelets
help form clots that control bleeding.
platelets
fibrin
red blood cell
white blood cell