ANATOMY. 
right fide lying below the right crus diaphragmatis, and 
thule of the left palling between the aorta and the fpine ; 
whilft the thoracic dudt itfelf lies at firft behind the aorta; 
but afterwards palles from that upwards, arid a little to the 
right fide, till it gets before the firfl vertebra of the loins. 
1 he fuperficial lymphatics of the lungs form a beautiful 
ne f -work, the larger branches running chiefly between the 
lobules, the finaller palling over them ; and here, as well 
as on the liver, and other parts, there are numerous valves, 
the exiitence of v. hich has been denied by fome authors. 
From the itirface they pafs to the root of the lungs, and 
there they go through the bronchial gland’s. At this place 
they are joined by the deep-feared abforbents, which creep 
along the branches of the trachea, and likewife on thole 
of the pulmonary artery and vein. Having left the glands, 
the principal part of thole from the left lung form a trunk 
which terminates in the thoracic duit, behind the divifion 
of the trachea into its right and left branches. The reft 
of the ablorbents of the-left lobe pafs through glands be¬ 
hind the arch of the aorta, and which are likewife com¬ 
mon to thole of the heart. 1 hey run at Lift into the tho¬ 
racic du£t near its termination in the red veins. After 
leaving the bronchial glands, the ablorbents of the right 
lung form three or four principal trunks ; one of which 
commonly afcends on the fore-part of the vena cava lupe- 
rior, and opens into the lymphatic trunk, that terminates 
in the veins of the right fide of the neck. The reft of thefe 
trunks go into rhe thoracic duct at the root of the lungs; 
and near this place the ablorbents of the right and left 
lungs communicate pretty freely together. 
The ablorbents of the heart, which have been knowrn 
only by the lateft anatomifts, come from its fuperficial and 
deep parts. Thele afterwards form principal trunks which 
accompany the coronary arteries and veins, and like them 
the largeft belong to the left ventricle. The abforbent 
accompanying the right coronary artery palles into the 
trunk, which terminates in the right fubclavian vein ; 
while the other, accompanying the left artery, goes to the 
upper end of tl,ie thoracic diuSt. The thoracic ducf, after 
receiving the vellels before mentioned, palles behind the 
aicending aorta, and goes to the left fide, terminating in 
the angle between the jugular and fubclavian ve ; n. But, 
juft before its termination, it generally goes higher up than 
the angle, and then bends down towards it; as feen in 
Fig. 5. 42, 43. Sometimes, though rarely, there are two 
thoracic duffs inftead of one. Sometimes the du6t fplits 
near the upper part of the thorax; and the two branches, 
after (preading out from one another, commonly unite a- 
gain at their termination in the angle between the jugular 
vein and the fubclavian veins. 
Lymphatics of the Head and Neck. —The lympha¬ 
tics of the head, like thofe in other parts of the body, are 
in two lets; one belonging to the outer, the other to the 
inner, parts. Thofe on the outftde of the head accompany 
the blood-veliels, and pafs through glands in their way to 
the neck. Thofe accompanying the temporal arferv go 
through fmall glands at the root of rhe zygomatic pro- 
cels, while the abforbents of the-occiput pafs through 
others behind the nialtoid procefs of the temporal bone. 
From the different parts of the face, the lymphatics chiefly 
accompany the branches and trunk of the facial artery. 
They come front the inner angle of the eye, from the nole, 
lips, and cheeks. Some of thefe pafs through (mail glands 
on the outfide of the buccinator mufcle, while the princi¬ 
pal branches go through larger glands on the outer and 
under fide of the lower jaw, near the correfponding blood- 
veilels, and the inferior maxillary gland. Others run thro’ 
the glands on the upper and under end of the parotid 
gland. The lymphatics of the inner fide of the nofe run 
principally with the internal maxillary artery, and pafs 
through the glands behind the angle of the lower jaw, 
where they, are joined by others from the inner part of the 
mouth. Deeper than this, and near the internal jugular 
vent, the lymphatics of the tongue, and parts about the 
os hyoides, pafs through the glands w hich belong likewife 
63 1 
to thofe of the deep parts of the head. The glandula thy- 
roidea has many lymphatic vellels, which can be inflated 
by blowing air into the cells of the gland : thele vellels 
pafs on each fide of the trachea, one part going into the 
trunk, which terminates in the right fubclavian and jugu¬ 
lar, and the other joining the thoracic duCt upon the left 
fide near its termination. 
In the plate of Ablorbent VelTels, Fig. 5. exhibits the 
trunk lo prepared as to tfiew the lymphatics and the tho¬ 
racic ciudt : 1, Is the neck. 2, The fhoulder. 3, The 
arm. 4, The outer end of the clavicle. 5, The extre¬ 
mity of the firft rib. 6, 'I he lubclavian mulcle. 7, The 
r ; b. 8, L ite trachea. 9, The aorta alcendens. 10, The 
fj me. 11, Vena azygos. 12, The aorta defcendens. 
13, The catliac artery. 14, The fuperior mefenteric ar¬ 
tery. 15, The right crus diaphragmatis. 16, The kid¬ 
ney. 17, k he right emulgent artery. 18, The common 
iliac artery.' 19, The divifion of the common iliac into 
the external and internal iliac arteries. 20, The cavity of 
the pelvis. 21, The lpine of the os ilium. 22, The groin. 
23, A lymphatic gland in the groin, into which lymphatic 
vellels from the lower extremity are feen to enter. 26, The 
pfoas mufcle with lymphatic vellels lying upon its infide. 
27, A plexus of lymphatics, which Slaving raffed over the 
brim of the pelvis at 23, having entered the cavity of the 
pelvis, and received the lymphatic vellels belonging to the 
vifcera contained in that cavity, next afcends, and palles 
behind the iliac artery to 2q, 29, The right pfoas, with a 
large plexus of lymphatics lying on its infide 30, 30, The 
plexus lying on each lide of the fpine. 31, 31, 31, Spaces 
occupied by the lymphatic glands; which are not here re- 
prefented, not having been injeCled in the fubjerit. 3 2, The 
trunk ot the laiteals lying on the under fide of the fupe¬ 
rior mefenteric artery. 33, The fame, dividing into two 
branches; one of which palles on each fide of the aorta, 
that of the right lide being feen to enter the thoracic duct 
at 34. 34, The thoracic duct beginning from the large 
lymphatics. 38, The thoracic duft palling under the cur¬ 
vature of the aorta to get to the left fubclavian vein. 
39, A plexus of lymphatic vellels pairing upon the trachea 
from the thyroid gland to the thoracic duff. 4c, The 
upper part of the thoracic duift lying between the left ca¬ 
rotid and the left jugular vqin, and pafting behind that 
vein downwards and outw ards tow ai ds the angle between 
the left jugular and the left lubclavian. 41, The extre¬ 
mity of the thoracic duel entering the angie between the 
left jugular and the left fubclavian vein. 46, That net¬ 
work pafting under the right fubclavian vein, and under the 
fubclavian mufcle, the clavicle being removed. The other 
numbers are explained in the courfe of the delcriptions. 
Lymphatics of the Upper Extremities. —Like the 
leg, each arm has two lets of lymphatic vefl'els : one fet, 
which lies immediately under the integuments, belongs to 
the Ikin and the cellular membrane,connecting it to the 
mufcles; the other accompanies the large arteries, and 
belongs to the parts deeper feated. The fuperficial fet of 
lymphatic veffels are numerous, and may be difcovered in 
emaciated droplica! fubjedls, by a careful difleCtion on the 
fore and back part of the arm. Of rhe deep-feated lym¬ 
phatics of the arm, two commonly accompany each artery, 
in the fame manner as the veins do : having reached the 
upper end of the arm, they go through the axillary glands, 
where they are joined by the lymphatics from the mamma 
and fide of the thorax, and alfo by thofe from the fhoulder. 
From thele glands larger branches run under the clavicle, 
and form a trunk, which receives thofe from the head and 
neck already defcribed. In tig. 3. fome of the lymphatics 
are feen running on the back-part of the fore-arm ar 6, 6, 
mod of them palling on its outfide, and twilling to rhe 
fore-part, near the head of the radius, as at 7. But in this 
reprefentation, there is a veil'd'which palles towards the 
inlide, tinder the inner condyle of the os humeri at 8, and 
fends a branch amongft the mulcles; which branch per¬ 
forates the interofleous ligament, getting between the ra¬ 
dius and ulna to the fore-part, where it joins a deep-feated 
one 
