frog reproduction

It consists of a pair of lungs, a pair of bronchi and a trachea. The lungs contain numerous microscopic functional units called alveol..

>The male gamete of one individual fertilizes the female gamete of another individual to produce the zygote. The fertilisation may be external or internal. External fertilisation takes place in animals like the fish and frog where the fertilisation takes place in water, outside the body. ..

It is represented by a pair of kidneys, a pair of ureters and a urinary bladder. Kidney contain numerous units called nephrons which filter blood, remove urea and convert it into urine. It is collected in the urinary bladder through ureters (kidney ducts), temporarily stored and then periodically e..

It is the most fundamental and universally seen interaction in sexually dimorphic organisms. Mating is the precopulatory sexual behaviour of two sexes of same species towards each other, which includes courtship, during copulation. Courtship includes mating calls, nest building, dancing and singin..

Parthenogenesis is a form of reproduction in which the ovum develops into a new individual without fertilisation. Natural parthenogenesis has been observed in many lower animals (it is characteristic of the rotifers), especially insects, e.g., the aphid. In many social insects, such as th..

Fishes: Lamprey can regenerate its lost tail. Some fishes have the ability to regenerate parts of its fins. Amphibians: The regeneration power is well marked in urodel amphibians like salamanders, newts and their axolotl larvae. They can regenerate limbs, tail, external gills, jaws, parts of e..

Many organ systems in coordination with one another form the organismic (or individual) level. A frog, for example, has various organ systems in its body like the integumentary system, digestive system, respiratory system, circulatory system, excretory system, reproductive syst..