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The dorsal and anal fin also contain basal cartilages, not just fin rays.
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dorsal and anal
The dorsal and anal fins are divided into anterior spiny and posterior soft-rayed portions, which may be partially or completely separated.
It moves by combining pectoral, dorsal, anal, and caudal fins.
Because of this, they are slow-moving and rely on their pectoral, dorsal, anal, and caudal fins for propulsion rather than by body undulation.
However, movement is usually quite precise ; dorsal and anal fins aid in manoeuvring and stabilizing.
The Molidae are conspicuous even within this oddball order: they lack swim bladders and spines, and are propelled by their very tall dorsal and anal fins.
In Aspidosiphon and Lithacrosiphon the anal shield is restricted to the dorsal side, causing the introvert to emerge at an angle, whereas it surrounds the anterior trunk in Cloeosiphon with the introvert emerging from its center.
The expression of bmp2 / 4 begins at the onset of gastrulation on the ectodermal side of the embryo, and as grastulation progresses its expression is narrowed down to the dorsal midline but is not expressed in the post anal tail.
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
Coelacanths have 8 fins – 2 dorsal fins, 2 pectoral fins, 2 pelvic fins, 1 anal fin, and 1 caudal fin.
Like other pikes, the body plan is typical of ambush predators with an elongated body, flat head and dorsal, pelvic and anal fins set far back on the body.
The first dorsal and anal fins are spinous, as is the operculum.
They are generally medium sized fish, and are distinguished by the presence of three dorsal fins on the back and two anal fins on the underside.
The anal fin usually has two spines while the dorsal fins are deeply notched or separate.
Scombrids have two dorsal fins, and a series of finlets behind the rear dorsal fin and anal fin.
The pikes tend to be lie-in-wait, ambush predators, with elongated snouts, long, well-muscled torsos, forked tails, and dorsal and anal fins set well back and opposite each other for rapid acceleration along a straight line, allowing the fish to quickly emerge from cover to capture their prey.
Their venomous spines are on both dorsal fins, the pectoral fins, pelvic fins, anal fins, and several on the gill cover.
Heterodontiforms have 2 dorsal fins, with fin spines, as well as an anal fin.
Before striking they bend their body and dash out to the prey using the large surface of tail fin, dorsal fin and anal fin to propel themselves.
They have no scutes and soft dorsal bases less than twice the length of the anal fin bases.
It has a disk-shaped body, and propels itself with its long, thin dorsal and anal fins ; it feeds primarily on jellyfish.
Many species of marine angelfishes have streamer-like extensions of the soft dorsal and anal fins.
The anal fin is low and almost as long as the dorsal fin.
dorsal and fin
The dorsal fin is small, visible only briefly during the dive sequence.
Spotted Dolphin The pectoral fin and dorsal fin of the dolphin contribute to its agility and speed in the water.
The pectoral fins are movable and used in maneuvering ; the dorsal fin is fixed and contributes stability, and the tail is used for propulsion, as well as maneuvering.
Swimming water animals such as fish and cetaceans actively use pectoral fins for maneuvering, and dorsal fins contribute stability as the animal swims, propelling and maneuvering with its tail, itself recognizable as a fin.
The gray whale also lacks a dorsal fin, instead bearing 6 to 12 dorsal crenulations (" knuckles "), which are raised bumps on the midline of its rear quarter, leading to the flukes.
Female residents characteristically have rounded dorsal fin tips that terminate in a sharp corner.
The gray or white area around the dorsal fin, known as the " saddle patch ", often contains some black colouring in residents.
Offshores appear to be smaller than the others, and females are characterized by dorsal fin tips that are continuously rounded.
Most of the dark parts of its body are medium gray instead of black, although it has a dark gray patch called a " dorsal cape " stretching back from its forehead to just behind its dorsal fin.
It is immediately recognizable by its extremely small white eye patch, shorter than usual dorsal fin, and bulbous head ( similar to a pilot whale ).
alt = Killer whale with only top of back and dorsal fin visible above water surface, the dorsal fin curves backward at the tip.
It has a heavy and robust body with a large dorsal fin up to tall.
At about the male's dorsal fin is more than twice the size of the female's and is more of a triangular shape — a tall, elongated isosceles triangle — whereas hers is shorter and more curved.
An individual killer whale can often be identified from its dorsal fin and saddle patch.
Variations such as nicks, scratches, and tears on the dorsal fin and the pattern of white or grey in the saddle patch are unique.
alt = Back and dorsal fin of killer whale projecting above the sea surface, including the grey saddle patch and part of the white eye patch: The dorsal fin rises steeply to a rounded point.
dorsal and also
The plantar interossei adducts and the dorsal interossei abducts these digits and are also plantar flexors at the metatarsophalangeal joints.
However, because of the large, scarred and nicked dorsal fins resembling those of mammal-hunting transients, they may also eat mammals and sharks.
Impulses are then transmitted to nerve fibers that terminate in lamina V, also in the dorsal horn, synapsing with neurons that join fibers from the fast pathway, crossing to the opposite side via the anterior white commissure, and traveling upwards through the anterolateral pathway.
The central analgesia system is mediated by 3 major components: the periaquaductal grey matter, the nucleus raphe magnus and the nociception inhibitory neurons within the dorsal horns of the spinal cord, which act to inhibit nociception-transmitting neurons also located in the spinal dorsal horn.
Accumulating evidence, primarily from neuroimaging but also neuropsychological investigations, has implicated the dorsal striatum in different aspects of motivational and learning processes that support goal-directed action.
Besides these well known dorsalizing factors, further molecules known to be involved in dorsal ventral patterning are also present in S. kowalevskii, such as a netrin that groups with netrin gene class 1 and 2.
A dorsal grip ( also known as the dorsal hang ) is an overhand grip employed while the gymnast's legs pass through the arms into a " skin the cat " position.
The springbok also has a pouch of white, brushlike hairs running along its back, which opens up when the animal senses danger, causing the dorsal hairs to stand on end.
The dorsal hippocampal formation also has more place field neurons than both the ventral and intermediate hippocampal formation ( Jung et al., 1994 ).
Various genes in the CYCLOIDEA ( CYC )/ DICHOTOMA ( DICH ) family are expressed in the upper ( also called dorsal or adaxial ) petal ; in some species, such as Cadia these genes are expressed throughout the flower, producing a radially symmetrical flower .< ref >
A dorsal slit ( also known as superincision ) is an incision made along the upper length of the foreskin with the intention to expose the glans penis without removing skin or tissue.
The thalamic complex is composed of the perithalamus ( or prethalamus, previously also known as ventral thalamus ), the mid-diencephalic organiser ( which forms later the zona limitans intrathalamica ( ZLI ) ) and the thalamus ( dorsal thalamus ).
In the case of spastic diplegia there is also a permanent neurosurgical treatment for spasticity, selective dorsal rhizotomy, that directly targets nerves in the spine that cause the spasticity, and destroys them, so that the spasticity cannot be activated at all.
In spastic CP, selective dorsal rhizotomy has also been used to decrease muscle overactivity.
This fish-like animal has many similarities to Y. lividum, but also differs in several aspects: it has a discernible heart, dorsal and ventral aorta, gill filaments, and a notochord ( neural chord ).
The penis in males is also erect in the anatomical position, hence the dorsal surface of the penis is actually anterior in the flaccid state.
* A coronal ( also known as frontal ) plane is a Y-X plane, perpendicular to the ground, which ( in humans ) separates the anterior from the posterior, the front from the back, the ventral from the dorsal.
The swim bladder is also of use as a stabilizing agent because in the upright position the center of mass is below the center of volume due to the dorsal position of the swim bladder.
* Compared to a tautog or cunner, its mouth is much larger, also the caudal fin, pectoral fin, and soft portion ( 11 rays ) of dorsal fin as long as spiny portion.
The central anatomy of the sixth nerve predicts ( correctly ) that infarcts affecting the dorsal pons at the level of the abducens nucleus can also affect the facial nerve, producing an ipsilateral facial palsy together with a lateral rectus palsy.
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