Diagram of Cockroach

The diagram of a cockroach typically illustrates its external anatomy, showcasing features like the head, thorax, abdomen, legs, wings, and antennae. Cockroaches belong to the phylum "Arthropoda," under the Animal Kingdom. Students learn the diagram of a cockroach in class 11 in the chapter 'Structural Organization of Animals' in NCERT.

The diagram of the cockroach labelled is given below:

Structure of Cockroach

The diagram of cockroach shows the structure of cockroach. The external features of cockroach diagram show the following parts:

Head

• Head of cockroach consists of 3 important structures - antennae, compound eyes, and mouth organ.
  • Antennae - sensory organs. Sensory organs aiding navigation by detecting chemical signals and air movements.
  • Compound eyes - Provide a wide field of vision for detecting predators, threats, and food sources.
  • Mouthparts - consist of mandibles for chewing and maxillae for mixing food before ingesting.

Also Read:Arthropoda

Thorax

• The thorax is divided into three main segments, each has a pair of legs.
• Legs are joint appendages aiding swift movement and surface climbing.
• Thorax segments are: prothorax, mesothorax, and metathorax.
• Legs comprise segments like coxa, femur, tibia, and tarsus, with sensory hairs detecting touch and vibrations.

Abdomen

• The abdomen of a male and female cockroach has ten segments
• Spiracles - small openings located on the sides of the abdomen that allow the exchange of gases and help in facilitating respiration.

Also Read:Morphology of cockroach

Difference Between Male and Female Cockroach

The difference between male and female cockroach is given below:

Internal Structures of Cockroach

The internal structure of cockroach has following components:

Diagram of Cockroach Digestive System

• The digestive system of a cockroach is composed of many organs, including the foregut, midgut, and hindgut.
• The foregut contains the mouth, mandible, oesophagus, and the crop.
• Crop is the organ where food is stored and is later digested.
• The midgut breaks down the food into smaller components and is associated with the absorption of nutrients.
• The hindgut processes waste materials and is responsible for the excretion of undigested food.

Diagram of Cockroach Respiratory System

• Cockroaches have a respiratory system, and they breathe through tracheae, which are branching tubes that deliver oxygen directly to cells.
• Air enters the body through spiracles that are located on the thorax and abdomen parts, and it later diffuses to the tracheal system.
• Tracheal tubes are extended throughout the body which helps supply oxygen to the tissues and helps in removing carbon dioxide.

Diagram of Cockroach Reproductive System

• Cockroaches exhibit sexual dimorphism with males typically possessing longer antennae and wings than females.
• Males have reproductive organs called testes, while females have ovaries.
• During mating, the male transfers sperm to the female reproductive organ through a structure called the aedeagus.

Diagram of Cockroach Circulatory System

• Cockroaches have an open circulatory system where the haemolymph or (blood) flows freely in the body cavity.
• A tubular heart pumps haemolymph through the arteries and into tiny spaces called sinuses, where it bathes the organs. Haemolymph returns to the heart through openings called ostia, and thus completing the circulatory cycle.

Diagram of Cockroach Nervous System

• The nervous system of a cockroach consists of a brain, ventral nerve cord, and ganglia located in each segment.
• The brain helps in processing sensory information and coordinates the insect's movements and behaviours in response to the external stimulus.
• Nerve impulses travel along the ventral nerve cord thereby transmitting signals between the brain and other body parts for coordination.

Conclusion - Diagram of Cockroach

The diagram of cockroach helps us easily understand the internal and external structure of cockroach. By understanding the structure and diagram of cockroaches, we gain knowledge about its features that has shown persistent existence in this world. The labelled cockroach diagram is given at the top of this article.

Also Read:

• Anatomy of Cockroach
• Structural Organization in Animals
• NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation in Animals