Frog body parts and functions essay

The frog has three respiratory surfaces on its body that it uses to exchange gas with the surroundings: While completely submerged all of the frog's repiration takes place through the skin.

Frog body parts and functions essay

Ranidae A cladogram showing the relationships of the different families of frogs in the clade Anura can be seen in the table above. This diagram, in the form of a treeshows how each frog family is related to other families, with each node representing a point of common ancestry.

It is based on Frost et al. Frogs have no tail, except as larvae, and most have long hind legs, elongated ankle bones, webbed toes, no claws, large eyes, and a smooth or warty skin. They have short vertebral columns, with no more than 10 free vertebrae and fused tailbones urostyle or coccyx.

This unique feature allows them to remain in places without access to the air, respiring through their skins. This makes frogs susceptible to various substances they may encounter in the environment, some of which may be toxic and can dissolve in the water film and be passed into their bloodstream.

This may be one of the causes of the worldwide decline in frog populations. The skin hangs loosely on the body because of the lack of loose connective tissue. Frogs have three eyelid membranes: They have a tympanum on each side of their heads which is involved in hearing and, in some species, is covered by skin.

True toads completely lack teeth, but most frogs have them, specifically pedicellate teeth in which the crown is separated from the root by fibrous tissue. These are on the edge of the upper jaw and vomerine teeth are also on the roof of their mouths.

No teeth are in the lower jaw and frogs usually swallow their food whole.

Respiratory Organs

The teeth are mainly used to grip the prey and keep it in place till swallowed, a process assisted by retracting the eyes into the head. Red marks indicate bones which have been substantially elongated in frogs and joints which have become mobile.

Blue indicates joints and bones which have not been modified or only somewhat elongated.

Frog body parts and functions essay

Feet and legs The structure of the feet and legs varies greatly among frog species, depending in part on whether they live primarily on the ground, in water, in trees or in burrows.

Frogs must be able to move quickly through their environment to catch prey and escape predators, and numerous adaptations help them to do so. Most frogs are either proficient at jumping or are descended from ancestors that were, with much of the musculoskeletal morphology modified for this purpose.

The tibia, fibula, and tarsals have been fused into a single, strong boneas have the radius and ulna in the fore limbs which must absorb the impact on landing. The metatarsals have become elongated to add to the leg length and allow frogs to push against the ground for a longer period on take-off.

The illium has elongated and formed a mobile joint with the sacrum which, in specialist jumpers such as ranids and hylids, functions as an additional limb joint to further power the leaps. The tail vertebrae have fused into a urostyle which is retracted inside the pelvis.

This enables the force to be transferred from the legs to the body during a leap. The muscular system has been similarly modified. The hind limbs of ancestral frogs presumably contained pairs of muscles which would act in opposition one muscle to flex the knee, a different muscle to extend itas is seen in most other limbed animals.

However, in modern frogs, almost all muscles have been modified to contribute to the action of jumping, with only a few small muscles remaining to bring the limb back to the starting position and maintain posture. These are not suction pads, the surface consisting instead of columnar cells with flat tops with small gaps between them lubricated by mucous glands.

When the frog applies pressure, the cells adhere to irregularities on the surface and the grip is maintained through surface tension.

Frog body parts and functions essay

This allows the frog to climb on smooth surfaces, but the system does not function efficiently when the pads are excessively wet. Furthermore, since hopping through trees can be dangerous, many arboreal frogs have hip joints to allow both hopping and walking. Some frogs that live high in trees even possess an elaborate degree of webbing between their toes.

This allows the frogs to "parachute" or make a controlled glide from one position in the canopy to another.

PPT - Frog Body Parts and Functions PowerPoint Presentation - ID

Most have smaller toe pads, if any, and little webbing. Some burrowing frogs such as Couch's spadefoot Scaphiopus couchii have a flap-like toe extension on the hind feet, a keratinised tubercle often referred to as a spade, that helps them to burrow. In some cases, the full leg still grows, but in others it does not, although the frog may still live out its normal lifespan with only three limbs.

Occasionally, a parasitic flatworm Ribeiroia ondatrae digs into the rear of a tadpole, causing a rearrangement of the limb bud cells and the frog develops an extra leg or two. Skin A frog's skin is protective, has a respiratory function, can absorb water and helps control body temperature.

It has many glands, particularly on the head and back, which often exude distasteful and toxic substances granular glands. The secretion is often sticky and helps keep the skin moist, protects against the entry of moulds and bacteria, and make the animal slippery and more able to escape from predators.

It usually splits down the middle of the back and across the belly, and the frog pulls its arms and legs free. The sloughed skin is then worked towards the head where it is quickly eaten.Functions of the body parts that make up the frog’s head • External nares or nostrils – Anterior openings for the entry or exit of air.

• Esophagus – Tube that connects the mouth and the stomach in a frog. May 15,  · This feature is not available right now. Please try again later. This organ is the liver. The liver is the largest structure of the body cavity.

Its brown in color and consists of lobes. The liver's function is to make a digestive juice named bile and its . Human and Frog Respiratory System The job of your respiratory system is very simple: To bring oxygen into your body, and remove the carbon dioxide from your ashio-midori.com body needs oxygen to survive.

Oxygen is used by your cells as it performs the functions of life. Adult frogs are characterized by long hind legs, a short body, webbed digits no tail and protruding eyes.

PPT - Frog Body Parts and Functions PowerPoint Presentation - ID

Most frost have a semi-aquatic lifestyle but move freely on land by jumping or climbing. Because a frog is an amphibian, it is a cold blooded animal and has thin moist skin.

frog body parts and their functions 3d models. I present here two fairies and their stars for decorated a child's room The fairy wishes is cm by 9 cm and a thickness of mm The star fairy is cm by 10 cm and a thickness of mm On the photo the fairies.

Frog - Wikipedia The placement and structure of the frog's internal organs are very similar to humans', though of course more simplistic, making them a suitable tool for teaching internal anatomy.
11 photos of the "Frog Reproductive System" Iris - The colored part of the eye which forms and regulates the size of the pupil. Cornea - The transparent anterior part of the external layer of the eye transparent outer covering of the eye.
Frog anatomy part 1 - Body parts - The World of Frogs It supplies the stomach, iv Pulmonary Nerve: It innervates the lungs.
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Biology - Muscles And Bones Of The Frog & Their Functions Flashcards by ProProfs