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What part of the heart keeps the heart beating rhythically?
the pacemaker, SA nodes
List the functions of the circulatory system.
transports blood, regulates body temp., delivers oxgen and nutrients to all body cells, removes wastes from cells,
Deoxygenated blood enters the heart from the ___.
left ventricle
Oxygenated blood leaves the heart from __ (it is the largest artery)
the aorta
What are all the parts of the circulatory system?
blood vessels and heart
Describe a capillary.
One-cell-thick blood
vessels where exchange of substances and wastes occur
Describe a vein.
Blood vessels that carry deoxygenated blood to the heart
What is the function of platelets?
Helps form blood clots
Which type of blood cell fight against diseases?
white blood cells
Why is blood plasma important?
Carries products from cells and transports important substances
Which blood vessle carries oxygenated blood away from the heart?
arteries
What is the function of Red Blood Cells?
to carry oxygen to cells (internal respiration)
Which is the correct path for a red blood cell to take through the human circulatory system begining as it enters the heart.
LA -> LV -> lungs -> RA ->RV
LA -> RV -> lungs -> LA ->RV
LA -> LV -> lungs -> LA ->LV
RA -> RV -> lungs -> RA ->RV
Which describes arteris?
strong, thick-wall, elastic and durable
strong, thin-walled
carries deoxygenated blood
has valves
____ are microscopic blood vessels where exchange of inportand substances and wastes occur.
capillaries
Explain how the structure of capillaires support their funcion?
Capillary walls are only 1 cell thick, to allow easy exchange of substances via diffusion
