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Q: Blood cells are produced in which system? A. circulatory system B. immune system C. skeletal system D. endocrine system
A: Blood cells are produced in which system? A. circulatory system
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User: Blood cells are produced in which system? A. circulatory system B. immune system C. skeletal system D. endocrine system

Weegy: Blood cells are produced in which system? A. circulatory system
koaley|Points 6262|

User: The circulatory, or cardiovascular system, is composed of A. the lungs, heart and brain. B. the lungs, blood vessels and heart. C. the heart, blood and blood vessels. D. the heart, arteries and veins.

Weegy: C. the heart, blood and blood vessels. The blood, heart, and blood vessels form the cardiovascular system.
migzptz|Points 7332|

User: A blood vessel with a thick layer of smooth muscle and elastic fibers is A. a vein. B. an artery. C. a capillary. D. the vena cava

Weegy: B. an artery

While both arteries and veins have smooth muscle and elastic fibers, arteries have thicker layers.
Another difference is that veins have valves while arteries don't.




User: A blood vessel one cell thick for absorption of nutrients and removal of wastes is A. a vein. B. an artery. C. a capillary. D. the pulmonary artery

Weegy: A blood vessel one cell thick for absorption of nutrients and removal of wastes is: C. a capillary - - - cards/
vanilla2bean|Points 3685|

User: Which cells protect the body by engulfing invaders or producing antibodies? A. red blood cells B. plasma cells C. platelets D. white blood cells

Weegy: These are white blood cells.
vandar|Points 911|

User: The cells in cardiac muscle would probably have a high number of A. mRNA molecules. B. Golgi apparati. C. lysosomes. D. mitochondria.

Weegy: The answer is B. Mitochondria.
redfireangel837|Points 92|

User: Heart disease includes all of the following risk factors except A. high blood pressure B. high cholesterol levels C. cigarette smoking D. regular exercise

User: Blood that leaves the heart for the body passes through a large blood vessel called the A. pulmonary vein. B. pulmonary artery. C. aorta. D. vena cava.

User: Capillaries belong to which body system? A. skeletal B. nervous C. digestive D. circulatory

Weegy: Capillaries belong to which body system? D. circulatory
koaley|Points 6262|

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Asked 1/24/2013 1:31:14 PM
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