Jeffersonian Republican. [volume] (Stroudsburg, Pa.) 1840-1853, 1846-09-10
No. i
Circulation Of the Blood.

Circulation of the Blood.
In describing the circulation Of the blood. It
is customary to begin at The heart. The heart
contains four cayiIies two venItIcIes aud '""
auricles that is the right and lelt sen'ricle>.
and The right and left auricle; cavities which
fill and empty a, every pulsaiio" OF the organ
The motion of the heart is that oi expansion
aud contraction a motion not unlike hat nl
bellows By expanding, the cssi'les are draw"
fuIl of blood, and by contracting. is thrown ou;
thus, by receiving the blood from The large, add
assing il into the arteries a constant ciIcmla-
,ioa is KEEP, up, from The heart, through the ar
reres, to all parts of the body. aud back To 'h'
hear, through Tue veins from all paris of the
body
The system OF blood vessels, known by tho
name of arteries, through which the blood pass
es IN its course from The heart, 10 every paft
Of the body, commences at The heari IN he form
Of large vessel, called The aOra, Of about one
half inch diameter in the adult man. From tbs
point i, passes upward and downward, giving
off large branches to every portion OF The bn"-
els, lungs, Leg, arms, head, &c. F'om thai
second arlerie, thousands of Others branch oil,
spreading and branching off in every direction.
until every minute particle OF flesh and bone.
however small, is very abundau'ly supplied
with arteries smaller than human hair. 81,
verv extensive is this system OF vessels. Iha,
not even pin or needle can enter any pac, "f
the flesh without woundlng some one or mcfs
of them, giving origin 10 the escape OF blood
and 80 small as not 10 be seen by the eye with
ou, The aid of glasses. These extremely small
arteries finally terminate by emerging into veins
Ia his way all The arteries terminate and all
the veins commence.
The veins, commencing a, the termination
of the arteries, return to the heart, By following
the course of the arteries back, So that de-
scripton of the veins in general terms amounts.
with few exceptions. 10 an inverted descrlp-
ion Of the arteries. ln The distribution OF the
veins there is generally much less regularly in
the corresponding arrangement Of The arteries.
Having thus arrived at the right auricies OF
the heart, The blood has lraversed It's grea, cir-
cui;-Ftom ihe right aurCle. the blood passes
into The right veutricle, from which il is thrown
with some force, through all paris of The lungs
traverses the grea, pulmonary arteries which,
like lhe other arteries Of the body, increase in
number and diminish in size until they emerge
into veins. The pulmonary veios originating
from the terminaions Of the minute exIremi,ies
of the pulmonary arteries, converge by dmn-
sbing in number and increasing in SIZE, until
they form one large vein entcring the lef, aur-
Gle of the heart BY these seins, the blood is
returned TO The heart, entering the left aurlcle.
from which il passes dire elly into the left yen-
,ricle, the cavity from which i, started.
The weight of blood, IN ordinary adult man.
is about "a pounds, measuring nearly gallons.
The color of The bIood is created By oxidation
of minute quaDlity of iron, which is carried
into the blood wnh The nu,ritlve principle
The blood is NC, all albumen, but it is albumen
mixed With, or dissolved in. water, and con-
tanning be ST des, the elements Of respiraon.-'-
The proportion of water TO other parts is about
as eighiy 10 twenty; that lie, so per cent waller
and 90 per cent. Of album, respiratory element
-C1Sket.