A second, dorsal aorta carries oxygenated blood from the gills to the rest of the body, and is homologous with the descending aorta of tetrapods.

A-delta and C fibers synapse on second order neurons in substantia gelatinosa ( laminae II and III of the dorsal horns ).

Should the bell swallow any of the ova, or even one of the younger embryos, these are passed back into the body cavity through the second, dorsal, opening.

alt = Drawing of a shark labeling major anatomical features, including mouth, snout, nostril, eye, spiracle, dorsal fin spine, caudal keel, clasper, labial furrows, gill openings, precaudal pit and fins: first and second dorsal, anal, pectoral, caudal and pelvic

The second set, of ventral ribs arise from the vertebral column just below the dorsal ribs, and enclose the lower body, often joining at the tips.

There are two dorsal fins, the first one spiny and the second soft.

As a protection against predators, triggerfish can erect the first two dorsal spines: The first, ( anterior ) spine is locked in place by erection of the short second spine, and can be unlocked only by depressing the second, “ trigger ” spine, hence the family name “ triggerfish ”.

Burbot have two soft dorsal fins: the first being low and short, the second being much longer.

It is inserted into the dorsal surface of the base of the second metacarpal bone, on its radial side.

The fibres end approximately at the middle of the forearm in the form of a flat tendon, which is closely connected with that of the extensor carpi radialis longus, and accompanies it to the wrist ; it passes beneath the Abductor pollicis longus and Extensor pollicis brevis, beneath the extensor retinaculum, beneath the dorsal carpal ligament, and inserts into the lateral dorsal surface of the base of the third metacarpal bone, with a few fibres inserting into the medial dorsal surface of the second metacarpal bone.

In humans, temperature sensation from thermoreceptors enters the spinal cord along the axons of Lissauer's tract that synapse on second order neurons in grey matter of the dorsal horn.

A saddle-like marking may be apparent between first and second dorsal fins.

The first dorsal fin is medium-sized, and there is no ridge running between it and the second dorsal fin.

There are dusky to black tips on the pectoral, pelvic, second dorsal, and anal fins.

It can be distinguished from other large requiem sharks by its relatively small first dorsal fin with a curving rear margin, its tiny second dorsal fin with a long free rear tip, and its long, sickle-shaped pectoral fins.

The second common name highlights the fact that its first dorsal fin is made up of long filamentous rays.

It has two nearly contiguous dorsal fins ; the first short based and high, the second long-based, extending to base of caudal fin.

Its second dorsal fin and anal fin are close to the same height.

National Transportation Safety Board ( NTSB ) employee Brian Murphy ( second from right ) updates NTSB Chairman Marion Blakey ( third from right ) on the investigation of the tail fin and rudder from AA flight 587 ( February 11, 2002 )

A second modified machine was built, powered by a Rolls-Royce F. XIIS, featuring a strut-braced tailplane, rigidly linked ailerons and a large elliptical horn balanced fin and rudder assembly designed to improve its effectiveness.

The caudal fin is rounded, the pectoral fins are fan-shaped, and pelvic fins are narrow with an elongate second fin ray.

Giant squid can grow to a tremendous size ( see Deep-sea gigantism ): recent estimates put the maximum size at for females and for males from caudal fin to the tip of the two long tentacles ( second only to the colossal squid at an estimated, one of the largest living organisms ).

The dorsal midline ridge merges into the first dorsal fin, placed about halfway along the body and twice the size of the second dorsal fin.

The pectoral fins are large and broad ; the pelvic and anal fins are much smaller but larger than the second dorsal fin.

There is an observation of an adult male zebra shark biting the pectoral fin of another adult male and pushing him against the sea floor ; the second male was turned on his back, and remained motionless for several minutes.

The first dorsal fin is small, high and pointed ( and may be spinous ); the second dorsal fin runs along the rest of the back and merges with the tail and extensive anal fin.

The second dorsal fin is also extended in the males of some species.

The second dorsal fin is relatively large with a short rear margin, and is placed opposite the anal fin.

In spots such as the elbows and knees the second skin is worn off and I realized the aborigines were much darker than they appeared ; ;

Steinberg spoke with warmth and enthusiasm about Italy: `` Rome is my second home.

He must construct transitions so that a dancer who is told to lie prone one second and to leap wildly the next will have some physical preparation for the leap.

The first half of The Charles Men, ending on the climax of the battle of Poltava in 1709, is more dramatically coherent than the second.

Sibylla is pregnant with their second child when she finds the ivory tablet concealed by her husband, and the identities of mother and son are revealed.

The second reason for his popularity is his complete spontaneity with the guitar.

The idea here is one of discharge but this must stand in opposition to a second view, Plato's notion of the arousal of emotion.

There is a second feature of the influences of literature, good literature, on emotional life which may have some special value for our time.

Again omitting recent developments, E.T. Leeds' dictum of 1913 has stood unchallenged: `` So far as archaeology is concerned, there is not the least warrant for the second ( shore occupied by ) of these theories ''.

And the second requirement for convincing people without their knowledge is artistic talent to prepare the words and pictures which persuade by using the principles which the scientists have discovered.

Even to be `` from hope and fear set free '' is at least better than to have lost the first without having got rid of the second.

Obviously, if this club is going to move from second to first in the American League, it will have to show improvement someplace.

Hank Foiles, backed up by Frank House who will be within calling distance in the minors, make up better second line catching than the Birds had all last year, but Gus is still that big man you need when you start talking pennant.

The 15th Street deposit is not to be confused with the nearby famous Mayflower Hotel cypress swamp on 17th Street reported in The Washington Post, August 2, 1955, which was probably formed during the second interglacial period and is therefore much younger.

The second mistake is Tibet.

Even apart from the fact that now at the age of 31 my personal life is being totally disrupted for the second time for no very compelling reason -- I cannot help looking around at the black leather jacket brigades standing idly on the street corners and in the taverns of every American city and asking myself if our society has gone mad.

He is interested in public opinion for two reasons: first, because it is important in itself, and, second, because he knows that the American public cares about a decent respect for the opinions of mankind.

The second capability is represented by our deployed ground, naval, and air forces in essential forward areas, together with ready reserves capable of effecting early emergency reinforcement.

A second fundamental principle is that involved particularly in the present proceeding -- the difference between nighttime and daytime propagation conditions with respect to the standard broadcast frequencies.

A second and also good practice is to shear off the tops, leaving an inch high stub with just a leaf or two on each branch.

I like to shear half my plants at a time, leaving one half of them to blossom while the second half is getting started on its new round of blooming.

If the plants are cared for and protected over the winter, the second year is more prolific than the first.