Biology Questions and Answers
goes to the ventricles and then leaves
the organ.
The blood is pumped out of the heart by
the contraction oform the ventricularf the muscle fibers that walls. The
contraction reduces the ventricle
volume thus increasinpressure and the blood then flows to g the internal (^) the
exit vessels (pulmonary artery for the
right ventricle and aorta fventricle). When ventricularor the left muscle (^)
fibers distend the ventricles regain their
original size coming from thand receive new blood flowe atria.
- What is the difference
between systole and diastole
Systole and diastole are the two stages
into which thSystole is the stage e cardiac cycle is diviwhen the ded.
contraction of ventricular muscle fibers
occurs aDiastole is thnd the ventriclese stage of the cardiac are emptied. cycle (^)
when the ventricular muscle fibers
distend blood. and the ventricles are filled with
- What are arterial vessels,
arteries and arterioles?
Arterial vthat carries bessels are every blood vessellood from the heart to the (^)
tissues. Arteries aarterial vessels. Arterioles arnd arterioles are thine (^)
arteries that end in capillaries.
Not all arteriblood (highly oxyes however contain arterialgenated blood). The
pulmonary artery and its ramifications,
arteries that carry blood from the right
heart ventricle to the lungs, contain
venous blood.
- What are venous vessels,
veins and venules?
Venous vesselsthat carries blood from the tissues are every blood vessel to
the heart. Veins and venules are venous
vessels.continuous to capillaries. Venules are thin veins that are
In general venous vblood. The pulmonary veiessels carry vns that carryenous
blood from the lungs to the left atrium
of the heart hoblood. wever contain arterial - What are the capillaries of
the vascular system?
Capillariesperform exchange of substances are small blood vessels that
between the blood and the body tissues.Capillaries are neither arteries nor are
they veins since thfeatures. In capillaries they have wall is madee distinct (^)
of a single layer of endothelial cells
through which suexchanged. These vesselsbstances are receive blood (^)
from the arterioles and drain to the
venules.
- What is the part of the
vascular system that performs
exchange of gases and other
substances with the tissues?
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