ZOOLOGY

The field cricket (Gryllus spp.) has a digestive and reproductive system adapted to its omnivorous diet and reproductive strategy. Here’s a breakdown of both systems: 1. Digestive System of Gryllus The digestive system of a cricket is similar to other insects but adapted to digest plant material, insects, and organic matter. The main components are:…

The American cockroach (Periplaneta americana) has complex systems that support its survival, including a digestive and reproductive system well-suited to its scavenging and reproductive habits. Here’s an overview of both: 1. Digestive System The digestive system of the American cockroach is adapted to process a wide variety of foods, from organic waste to decaying materials….

Insects undergo a highly diverse and specialized development process that transforms them from eggs to adults. This process is closely linked to their ecological roles and life cycle strategies. Insects exhibit direct development or metamorphosis, the latter being either incomplete or complete. Types of Insect Development 1. Ametabolous Development (No Metamorphosis) • Definition: Insects hatch…

The reproductive system of insects is highly specialized and varies between species, but it generally functions to produce, store, and transfer gametes for successful reproduction. Insects reproduce sexually, although some species exhibit forms of asexual reproduction like parthenogenesis. Most insects are dioecious (separate sexes), but a few are hermaphroditic. General Structure of the Reproductive System…

Insects, like all living organisms, require nutrients for growth, development, reproduction, and survival. Their nutritional requirements depend on factors such as species, life stage, feeding habits, and ecological niche. While some insects have generalized diets, others are highly specialized and derive their nutrients from specific sources. Macronutrients Required by Insects 1. Proteins • Function: o…

Insects possess a wide variety of sense organs that allow them to interact with their environment effectively. These organs are specialized for detecting light, sound, touch, chemical signals, temperature, and more. They are distributed across the head, thorax, legs, and even the abdomen, making insects highly adaptable to diverse habitats and ecological niches. Types of…

Insects, despite their tough exoskeletons, have soft parts essential for physiological functions such as digestion, reproduction, respiration, and sensory processes. These soft tissues are typically internal but may also include certain external structures like membranes or flexible body regions. 1. Internal Soft Parts • Muscles: o Insects have a robust system of soft, striated muscles…

The abdomen is the posterior section of an insect’s body, located behind the thorax. It primarily houses vital internal organs and structures related to digestion, excretion, reproduction, and respiration. The abdomen is typically more flexible than the thorax, aiding in movement and accommodating expansion during feeding or reproduction. Structure of the Abdomen 1. Segments: o…

Insects are the only invertebrates capable of powered flight. Their wings are specialized extensions of the exoskeleton, typically found on the mesothorax and metathorax. The structure, function, and number of wings vary widely across insect groups, allowing them to adapt to diverse environments and ecological roles. Structure of Insect Wings 1. Basic Components: o Wing…

The thorax is the middle body region of an insect, situated between the head and the abdomen. It is primarily specialized for locomotion, housing the muscles responsible for wing movement and leg motion. The thorax supports three pairs of legs and, in winged insects, one or two pairs of wings. Structure of the Thorax The…