5 g ACTIONS OF MUSCLES. 



tores, quad, fern., psoas mag., iliacus, the 3 adductores, 

 biceps femoris. 



I*6g : flexed, semi-tendinosus, biceps, semi-membranosus, 

 gracilis, sartorius, popliteus. Extended, rectusfem., crureus 

 2 vasti. 



Pootl inwards, ext. prop, pollicis, flex. long, dig., flex, 

 long, pol., tibialis posticus. Out-wards, the 3 peronei, ext. 

 long. dig. Flexed, tibialis anticus, ext. prop, pol., ext. long, 

 dig., peroneus tertius. Extended, gastrocnemius, plantaris, 

 soleus, flex. long, dig., flex, long, pol., tib. posticus, peroneus 

 lopgus and brevis. 



Toes : flexed, adductor, abductor, flex, longus and* brevis 

 pollicis, abductor and flex. brev. minimi digiti, flex. brev. and 

 longus digitorum, flex, accessorius, lumbricales, interossei. 

 Extended, ext. long, and brevis digitorum, ext. prop, pollicis. 

 Inwards, abductor pollicis, interossei. Outwards, add. 

 pollicis and min. digiti, interossei. 



CIE-CTJL^TIO^ST. 



Cardiac and pulmoaic: The venae cavae receive the systemic 

 venous blood, and convey it into the right auricle ; then it 

 passes into the right ventricle( through the tricuspid, or auric- 

 ulo-ventricular valves, to be thrown into the pulmonic artery 

 (going through the semilunar, or pulmonary valves); is then 

 conveyed to the lungs and oxygenized in the capillary plexus 

 about the intercellular structure and the air-cells, and re- 

 turned, by the pulmonary veins (4 in number) to the left side 

 of the heart, into the left auricle ; it then passes into the left 

 ventricle (through the mitral valve) to be forced into the 

 aorta (through the semilunar valves), and from thence to sup- 

 ply the system at large. 



Fetal I from the placenta through the umbilical vein to 

 to the liver; from thence, by the hepatic veins and ductux 

 venosuf Ar-antii, to the inferior vena cava,. to the right 

 auricle ; the most of the current, guided by the Eustachian 

 valve, passes through the foramen ovale into the /^/"/auricle, 

 and from thence into the left ventricle, and from thence into 

 the aorta and system at large. A part of the current, how-, 

 ever, enters the right ventricle, is then forced into the pul- 

 monary artery, and from the imperviousness of thd foetal 

 lungs is most all conveyed to the aorta by the ductus arterio- 

 xus Boialli. The blood is at last conducted by the umbilical 

 arteries (branches of the internal iliac) to the placenta for 

 reoxygenation. 



