Word Finder - distal

definition

Remote from the point of attachment or origin.

example

the distal end of a bone or muscle

definition

Facing the wisdom tooth or temporomandibular joint on the same side of the jaw.

definition

Far or farther from the speaker.

Bleeding from a vein is of a darker colour; the flow is steady, and the bleeding is from the distal end of the vessel.

The distal portions form the muscles of the tentacles.

The longitudinal system is discontinuous, and is subdivided into proximal, medial and distal portions.

The maxillaries are connected with the distal anterior corner of the quadrate by the thin, splint-like jugal and quadratojugal.

It is almost certain that the distal of these two segments really belongs to the thigh, but the ordinary nomenclature will be used in the present article, as this character is of great importance in discriminating families, and the two segments in question are referred to the trochanter by most systematic writers.

It is homologous with the distal ends of the ceratohyals or ventral elements of the hyoidean or second visceral arch.

In birds of various groups the clavicles are more or less degenerated, the reduction beginning at the distal end.

Its proximal end forms a shallow cup for articulation with the outer condyle of the humerus; the distal end bears a knob which fits into the radial carpal.

This and the third are much longer and fuse together at their upper and distal ends, leaving as a rule a space between the shafts.

Typically there are two pairs - a proximal, more or less approximated on the postero-dorsal surface, and a distal pair, more widely separate.

But the proximal pair are often fused into a single median antenna (supplied, however, by two nerves), and in one case at least the distal pair may be similarly fused.

If a distal pore or aperture is present, it is excretory in function; suck varieties have been termed " cystons " by Haeckel.

The clavicles, when united, as usual, form the furcula; mostly the distal median portion is drawn out into a hypocleidium of various shape.

The distal end of the humerus ends in a trochlea, with a larger knob for the ulna and a smaller oval knob for the radius.

Of wrist-bones only two remain in the adult bird; the original distal carpals coalesce with the proximal end of the metacarpals.

The distal half of the fibula is very slender and normally does not reach the ankle-joint; it is attached to the peroneal ridge of the tibia.

Of the metatarsals the fifth occurs as an embryonic vestige near the joint; the first is reduced to its distal portion, and is, with the hallux, shoved on to the inner and posterior side of the foot, at least in the majority of birds.

Here, alone, at the distal portion of the tendon, occur muscular fibres, but these are unstriped, belonging to the category of cutaneous muscles.

One of these, broad and fleshy, is inserted upon the posterior surface of the distal third of the femur.

The keel is pushed back to the distal third of the sternum, whilst the original anterior margin of the keel is correspondingly elongated,and the furcula fused with the rostral portion.

It is protruded and retracted by special muscles which are partly attached to the ventral, distal end of the ilium.

The distal extremity of this apparatus is sometimes eversible as a penis.

In a few Enchytraeidae and Lumbriculidae the spermathecae open at the distal extremity into the oesophagus, which is a fact difficult of explanation.

Elaboration in the form of the feelers, often a secondary sexual character in male insects, may result from a distal broadening of the segments, so that the appendage becomes serrate, or from the development of processes bearing sensory organs, so that the structure is pinnate or feather-like.

The fifth (distal) tarsal segment carries a median adhesive pad - the pulvillus - on either side of which is a claw.

An ear of another type is found in the swollen second segment of the feeler in many male gnats and midges, the cuticle between this segment and the third forming an annular drum which is connected with numerous nerveendings, while the fine bristles on the more distal segments vibrate in response to the note produced by the humming of the female.

Further examination also revealed the fact 3 that in certain groups the number of " primaries," or quill-feathers growing from the manus or distal segment of the wing, formed another characteristic easy of observation.

Serrula on movable digit of appendages of 1st pair fixed throughout its length, and broader at its proximal than at its distal end; the immovable digit with an external process.

Intromittent organ of male placed at the distal end of the appendage of the 5th pair.

When a nerve-trunk is separated from its central connexion, the distal portion falls into a state of fatty degeneration (Wallerian or secondary degeneration).

The replacement of detached mature proglottides at the distal end of the Cestode-body by others is not regeneration, for the replacing set has already developed, and in certain cases they can complete their development quite independently after being detached from the parent.

Cavity of the zooecium subdivided by transverse diaphragms, most numerous in the distal portion.

The species may be further distinguished by the former having the proximal third of the tail-quills pure white, and the distal two-thirds black, with a narrow white margin, while the latter has the same feathers barred with black and white alternately for nearly their whole length.

The largest is placed ventrally at some distance distal to the mouth.

There are also two pairs of distal antennae.

In Asplanchnaceae the germary is median, continuous at the distal end with the middle of the transverse horseshoe-shaped vitellary.

Usually each tube is provided with caecal appendages on its proximal portion, and these serve as vesiculae seminales, while the distal portion is enlarged and glandular and secretes the egg-shell.

A little later the breaking down of the whole axon, both axis cylinder and myelin sheath alike, seems to occur simultaneously throughout its entire length distal to the place of severance.

The distal club corresponds to the crystal-sac of an ordinary After Wladimir Schewiakoff, simplified from rhopalium, but bears a battery a coloured plate in Morphologisches Jahrbuch, of nematocysts in place of the xv., 1889, by permission of Wilhelm Engelotoliths.

The histological structure oc', oc 2, Distal and proximal median of the Scyphomedusae is in ocelli.

The two distal endites are regarded as corresponding to the endopodite and exopodite of the higher Crustacea, the axis or corm of the Phyllopod limb representing the protopodite.

The number of exites is less constant, but, in A pus, two are present, the proximal branchial in function and the distal forming a stiffer plate which probably aids in swimming.

It is not altogether easy to recognize the homologies of the endites and exites even within the order Phyllopoda, and the identification of the two distal endites as corresponding to the endopodite and exopodite of higher Crustacea is not free from difficulty.

Close to each cerebral ganglion is a pleural ganglion, and each is connected by a long nerve with the pedal ganglion of the same side, the two connectives of either side being united in the distal part of their course.

In Cycas revoluta and C. circinalis each leaf-like carpel may produce several laterally attached ovules, but in C. Normanbyana the carpel is shorter and the ovules are reduced to two; this latter type brings us nearer to the carpels of Dioon, in which the flower has the form of a cone, and the distal end of the carpels is longer and more leaf-like than in the other genera of the Zamieae, which are characterized by shorter carpels with thick peltate heads bearing two ovules on the morphologically lower surface.

The distal ends of these girdles give off several branches, which traverse the petiole and rachis as numerous collateral bundles.

Similarly in the sporophylls of some cycads the bundles are endarch near the base and mesarch near the distal end of the stamen or carpel.

The stamens of Araucaria and Agathis are peculiar in bearing several long and narrow free pollen-sacs; these may be compared with the sporangiophores of the horsetails (Equisetum); in Taxus (yew) the filament is attached to the centre of a large circular distal expansion, which bears several pollen-sacs on its under surface.

In Araucaria Cookii and some allied species each scale has a small pointed projection from its upper face near the distal end, the scales of Cunninghamia (China) are characterized by a somewhat ragged membranous projection extending across the upper face between the seeds and the distal end of the scale; in the scales of Athrotaxis (Tasmania) a prominent rounded ridge occupies a corresponding position.

In the order Stolonifera the zooids spring at intervals from branching or lamellar stolons, and are usually free from one another, except at their bases, but in some cases horizontal solenia arising at various heights from the body-wall may place the more distal portions of the zooids in communication with one another.