What has a head thorax and abdomen?

What has a head thorax and abdomen?

Humans have a head, torso (similar to thorax) and abdomen. Spiders have a combination of head and thorax (cephalothorax) and abdomen. This house fly drawing illustrates mouthparts and wing and leg segments among other characteristics.

What are the three main parts of the head thorax and abdomen?

The basic model of an adult insect is simple: It has a body divided into three parts (head, thorax and abdomen), three pairs of legs and two pairs of wings. Insects have adopted different shapes, colours and all kinds of adaptations, but their body is almost always composed of these common elements.

What is thorax and abdomen in insects?

The thorax is the midsection (tagma) of the insect body. It holds the head, legs, wings and abdomen. Members of suborder Apocrita (wasps, ants and bees) in the order Hymenoptera have the first segment of the abdomen fused with the thorax, which is called the propodeum.

What is the function of the head of an insect?

The Head. In most insects, the head capsule is a sturdy compartment that houses the brain, a mouth opening, mouthparts used for ingestion of food, and major sense organs (including antennae, compound eyes, and ocelli).

What are abdominal appendages?

Abdominal appendages are complex novel structures that have evolved within the fly family Sepsidae (Hennig 1949; Pont 1979; Meier 1995; Meier 1996). Most species in the Sepsidae have a sexually dimorphic sternite on the fourth abdominal segment.

What is it called when the head and thorax are fused together?

The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind.

What is the function of the thorax?

It provides a base for the muscle attachment of the upper extremities, the head and neck, the vertebral column, and the pelvis. The thorax also provides protection for the heart, lungs, and viscera.

What is the function of thorax in grasshopper?

Spiracles – a series of holes located along both sides of the abdomen; they are used for breathing. Thorax – the middle area of the grasshoppers body – where the legs and wings are attached. Walking legs – the four, short front legs that are used for walking and holding prey while they eat.

What is the function of abdomen in insects?

The insect body is divided into three parts: the head, thorax, and abdomen. The head is specialized for sensory input and food intake; the thorax, which is the anchor point for the legs and wings (if present), is specialized for locomotion; and the abdomen for digestion, respiration, excretion, and reproduction.

What is the head of an insect called?

The head can be divided into general regions (see General Insect Head Regions and Mouthparts, left): the top of the head is the vertex, the side or cheeks are gena, the front of the face is the frons, and below the frons is the clypeus. These regions may be highly modified or lost in some groups of insects.

Why is the thorax important?

Your thorax is an important structure, the bones and ligaments protecting vital internal organs underneath. But it’s also where we get most of the rotation of our trunk. The nerves from our thorax supply the abdominal muscles; these muscles protect our lower back and abdominal organs.

What are the functions of the head, thorax, and abdomen?

Most people recognize the three tagmata—head, thorax, and abdomen—as characteristic of insects. The way they appear is rooted in a division of responsibilities. The head is for orientation, ingestion, and cognitive process; the thorax for locomotion; and the abdomen for digestion and reproduction.

Is the thorax part of the human body?

Thorax, as per its definition, is the significant part of the body between the head and abdomen. This definition fits all the animals whose bodies are differentiated into head, thorax, and abdomen. The human thorax is more complicated than the rest of the animals.

What are the three segments of the thorax called?

The thoraxconsists of three segments called the pro-, meso-, and metathorax. Appendages used for movement are attached to the thorax. Each of the segments of the thorax bears one pair of legs and if wings are present they are found on the meso- and metathorax only. The top of the prothorax is called the pronotum.

Which is more specialized the thorax or the abdomen?

Functional role of the thorax has always been locomotion, since the primary modifications of the thorax have been for locomotion. The abdomen is more conspicuously segmented than either the head or the thorax. The abdomen is the least specialized of the body tagma, but there are notable exceptions such as the scale insects.