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Which of the following blood cell types is paired with itscorrect function?

	a.	red blood cells (erythrocytes) / transporting oxygen from thelungs to body tissues
	b.	white blood cells (leukocytes) / defending against foreignpathogens
	c.	platelets (thrombocytes) / assisting in blood clotting
	d.	all of these blood cell types are paired with their correctfunction

Which of the following is the mostcommon human blood type?

	a.	type O blood
	b.	type A blood
	c.	type B blood
	d.	type AB blood

1. Which of the following is a function of thepericardium?

   	a.	it provides an enclosure within which the heart can expand andcontract
   	b.	it provides a slippery inner lining which minimizes frictionwhen the heart beats
   	c.	it provides protection for the heart
   	d.	all of these are functions of the pericardium

   Contraction of the _____ fills the rightventricle of the heart.

   	a.	superior vena cava
   	b.	right atrium
   	c.	pulmonary artery
   	d.	left atrium

   Which of the following statements about bloodvesselsis false?

   	a.	arteries convey blood away from the heart toward capillaries
   	b.	arteries branch into arterioles, which branch intocapillaries
   	c.	arteries always convey oxygenated blood
   	d.	veins convey blood toward the heart from capillarie

   Which of the following chambers of the heart pumps blood to thelungs?

   	a.	the right atrium
   	b.	the right ventricle
   	c.	the left atrium
   	d.	the left ventricle