Americans love
old
things
.
They
like
to
visit
historic
houses
and
museums
,
they
the
same
At
time,
rebuild
but
are
come
old places
and
remember the early days
of their country. They are
interested in old traditions,
they
good at
making new traditions too.
The people of the United
States
from many
different places in the world. In one city you can find people
whose parents or great-grandparents came from Africa, Asia,
South America, and every European country. These different
people brought to their new land their traditions and their
lifestyle.
Americans have a lot of festivals of the Old World, but there
American festivals and traditions as well. For
example, Thanksgiving is an American holiday.
The tradition goes back to the year 1621 when they decided
to have a thanksgiving dinner for all the people. They wanted
to thank God for many things.
It was a difficult year, but the people still had food to eat.
They also wanted to thank the American Indians who helped
them.
Today Americans have Thanksgiving dinner on the fourth
Thursday of November. They usually eat turkey and sweet
potatoes. Thanksgiving is the day when families get together.
are
new
2. The four chambers of the heart are: the right atrium, the right ventricle, the left atrium, and the left ventricle.
3.There are four valves in the heart: the atrioventricular valves (lie between the atria and the ventricles); the bicuspid or mitral valve (located on the left side of the heart); the tricuspid valve (located on the right side of the heart); the pulmonic semilunar valve (lies between the right ventricle and the pulmonary artery) and the aortic semilunar valve (lies between the left ventricle and the aorta).
4.Pulmonic circulation deals with deoxygenatrd blood, but the systemic with oxygenates blood.
5.It consists of sympathetic and parasympathetic nervous system.
6.The normal heart rate is 60 to 80 beats per minute.
7.The normal blood pressure is 120mm Hg for the systolic blood pressure and 80mm Hg for the diastolic blood pressure.
8. These are the types types of vessels: arteries, arterioles, capillaries, venules, veins.
1.True.
2.False, it receives oxygenated blood.
3.True
4.True
5.True