What is Phylum Arthropoda?
- Arthropoda is the group of animals that have specialised joint appendages, an adaptation seen in their
For example, spiders, cockroaches, ants, beetles, etc.
Arthropods
- Arthropods are triploblastic and coelomate organisms, their body is developed from three germ layers: endoderm, mesoderm,and
- The body has a true body cavity. They have three major divisions of their body: head, thorax, and
The Structure of Arthropods
- The complete body has segments which help to locate the various internal
- The head region usually has a pair of compound eyes and
- Most arthropods have a well-developed mouth with parts that help in biting, tearing, chewing, and
- Some arthropods rely on proboscis that only helps in sucking liquids like fruit nectar or blood.
- The thorax and abdomen contain important vital organs and jointed
Which systems are present in arthropods?
- Arthropods have a well-developed digestive system. The system begins with a proper mouth and ends with the
- The excretory system is different in different
- The aquatic arthropods prefer diluting ammonia, a major nitrogenous waste, and throwing it out through a permeable membrane through its
- Terrestrial arthropods contain specialised tubes called Malpighian tubules to excrete nitrogenous
- Some of them have structures like Nephridia which help in eliminating the nitrogenous wastes out of the
- These invertebrates have clusters of neurons called Ganglions, which act as major regulators in the nervous
- Most of the Arthropods have separate sexes. They carry out sexual reproduction. Arthropods prefer internal fertilisation but there are some
Anatomy of Arthropods
What is Moulting?
- Arthropods exhibit a unique characteristic of Moulting. It is the process in which animals cast their outermost layer of skin as they grow in size and reach the next level of their life cycle.
For example, when a butterfly comes out of a cocoon-like structure, it tears open the transparent layer and flies with its newly developed wings. This is called the Moulting process.
