INCOMPLETE METAMORPHOSIS SKIN

In arthropods, the body is covered with a thick or thin exoskeleton that is not detached progressively. Both animals and arthropods regenerate their external tissues during their life cycle.

INCOMPLETE METAMORPHOSIS SKIN

Molting refers to the shed of outer body covering, feathers, hair or skin to make way for new growth. Key Terms: Adult, Complete Metamorphosis, Ecdysis Egg, Exoskeleton, Incomplete Metamorphosis, Molting, Nymph What is the Difference Between Molting and Metamorphosis What are the Similarities Between Molting and MetamorphosisĤ. The two main types of metamorphosis are incomplete metamorphosis and complete metamorphosis. Metamorphosis occurs in insects and all animals. Molting mainly referred to the shed of the exoskeleton of arthropods. The main difference between molting and metamorphosis is that molting refers to the shed of body parts periodically such as body coverings, feathers, cuticles or skin whereas metamorphosis refers to the process of transformation from an immature form to the mature form through distinct stages. Molting and metamorphosis are two events of the life cycle of animals. Examples for insects with incomplete metamorphosis include mites, aphids, bugs, cockroaches etc.Main Difference – Molting vs Metamorphosis Nymph stage is more similar to adult form with the exception of color, size, and the lack of wings. Incomplete metamorphosis has three life stages egg, nymph and adult. This can be seen in insects like moths and butterflies. Each of this stage is very distinguishable. Insects with complete metamorphosis have four stages in their life cycle, namely egg, larva, pupa, and adult. There are two types of metamorphosis complete and incomplete metamorphosis. However, when decreasing the hormone concentration of blood, it increases the possibility of metamorphosis. Metamorphosis is suppressed by juvenile hormone, which secretes during the molting. Metamorphosis is mainly controlled by the endocrine system of arthropods. However, most distinguishable changes can be seen in insects during their growth from larvae to adult. In many arthropods, these changes are minor, including the changes in size and color or pattern. Metamorphosis is the process of which arthropods undergo changes in their form between the immature stages and adult during their growth. Hence, it causes an insect to remain larva stage after ecdysis rather than transforming into pupil stage. While secreting ecdysone, another pair of glands near the brain secretes juvenile hormone, which inhibits the metamorphosis. These events are triggered by the hormone called ecdysone, which is secreted by a pair of glands in the thorax of insects. Molting cycle consists of sequence of events that ultimately build a new, larger exoskeleton within the old one. The stages between the periods of molting are called instars.

In addition, casting off the old exoskeleton is known as ecdysis. The entire process starting from the development of new exoskeleton to casting off the old exoskeleton is called molting. However, before they shed the exoskeleton, they always have a new developing exoskeleton underneath the old one. To avoid this problem, insects have to shed their exoskeleton several times during their life time. At the same time, it restricts the growth of insects. This exoskeleton protects the inside organs and also prevents water loss. What is Molting?Īll the insects have a hardened exoskeleton made up of chitin. In this article, difference between molting and metamorphosis will be explained via discussing individual events. Molting is not found in vertebrates. However, some vertebrates like amphibians show metamorphosis during their life cycle.

These two phenomena are controlled by the two classes of hormones ecdysteroids and juvenile hormones (JHs). Molting and metamorphosis are very common in insects. Molting and metamorphosis are two important events in the life cycle of animals that show some difference between them.