6 Human physiology 6.2 The blood system
Terms in this set (22)
the main artery of circulatory system that carries blood from the left side of the heart to the arteries of all
limbs and organs except the lungs.
a small terminal branch of an artery that connects with a capillary.
a vessel that carries blood away from the heart to organs through the body.
Atrium (plural atria)
a chamber that receives blood returning to the heart.
the hydrostatic force that blood exerts against the wall of a blood vessel.
a microscopic blood vessel that penetrates the tissues and consists of a single layer of endothelial cells to
allow exchange with interstitial fluid.
the volume of blood pumped per minute by the left ventricle of the heart.
the minimum blood pressure during relaxation of heart muscles.
a thick, yellow connective-tissue fibre composed principally of elastin and characterized by giving
great elasticity to tissues in the body.
a hormone produced as a response to stress, also called adrenaline.
the lowest part of the brain that controls autonomic and homeostatic functions.
a contraction of the heart without external stimulation from a nerve.
a specialized region of the right atrium that sets the rate of heart contraction, also called the sinoatrial
the separated circulatory system that links the lungs and heart in humans.
the force of blood leaving the heart in one heartbeat; it is felt where arteries pass near the skin.
the separated circulatory system that links the heart to the rest of the body.
the maximum blood pressure caused by heart muscles contracting and pumping blood.
a membranous structure in a hollow organ or passage that folds or closes to prevent the return flow of the
body fluid passing through it.
when the circular muscles in the artery wall contract, narrowing the lumen.
when the circular muscles relax, increasing the lumen size and hence blood flow to downstream
a vessel that returns blood to the heart.
the chambers on the left and right side of the heart that receive blood from the atria and contract to force
it into the aorta and pulmonary artery respectively.