The outflow phase, " ventricular ejection, " is when the intra-ventricular pressure has achieved a higher pressure than the blood in the aorta ( or the pulmonary trunk ), the corresponding semilunar valves open.
32.
Where the groove ceases laterally the patellar surface is seen to be continued backward as a intercondyloid fossa; this semilunar area articulates with the medial vertical facet of the patella in forced flexion of the knee-joint.
33.
The "'hiatus semilunaris "'( or "'semilunar hiatus "') is a crescent-shaped groove in the lateral wall of the nasal cavity just inferior to the ethmoidal bulla.
34.
Behind this line is a narrow semilunar surface, the upper part of which is rough and gives origin to a portion of the Glut�us maximus; the lower part is smooth and has no muscular fibers attached to it.
35.
Behind this line is a narrow semilunar surface, the upper part of which is rough and gives origin to a portion of the Gluteus maximus; the lower part is smooth and has no muscular fibers attached to it.
36.
Initially, as the muscles in the ventricle contract, the pressure of the blood within the chamber rises, but it is not yet high enough to open the semilunar ( pulmonary and aortic ) valves and be ejected from the heart.
37.
Trays were comparatively shallow, oval in outline and varying in length; the ends were narrowed and truncated to form handles, the upper faces of which were usually decorated with neatly cut-in disc-like or semilunar figures or depressions.
38.
The grooved portion of the articular surface fits accurately within the semilunar notch of the ulna; it is broader and deeper on the posterior than on the anterior aspect of the bone, and is inclined obliquely downward and forward toward the medial side.
39.
Laterally, it expands in either hemisphere into a considerable lobule, the superior semilunar lobule ( lobulus semilunaris superior; postero-superior lobules ), which occupies the posterior third of the upper surface of the hemisphere, and is bounded below by the horizontal sulcus.
40.
Oxygen deprived blood from the superior and inferior vena cava enters the right atrium of the heart and flows through the tricuspid valve ( right atrioventricular valve ) into the right ventricle, from which it is then pumped through the pulmonary semilunar valve into the pulmonary artery to the lungs.
