Gena:
The sides of the head below the compound eyes
. Frons: The front part of the head between the compound eyes and the mouthparts.
How many segments are found in insect head?
Insect head is a Anterior most part of insect body it is hard and highly sclerotized compact structure which consisting of
six segments
that are fused to form a head capsule. The insect head consists of mouthparts, compound eyes, simple eyes (ocelli) and a single pair of antennae.
What is the function of Clypeus?
The clypeus is one of the sclerites that make up the face of an arthropod. In insects, the clypeus
delimits the lower margin of the face
, with the labrum articulated along the ventral margin of the clypeus. The mandibles bracket the labrum, but do not touch the clypeus.
What are the segments of an insect?
Adult insects have segmented bodies divided into
a head, a thorax and an abdomen
. The head carries a single pair of antennae at the front and a pair of compound eyes on the side. The thorax is made up of three segments, each with a pair of jointed legs.
What is the function of tentorium in insect?
The tentorium (plural tentoria) is a term used to refer to
the framework of internal supports within an arthropod head
. The tentorium is formed by ingrowths of the exoskeleton, called apophyses, which fuse in various ways to provide rigid support for the muscles of the head.
How do mandibles work?
Insect mandibles are a pair of appendages near the insect's mouth, and the most anterior of the three pairs of oral appendages (the labrum is more anterior, but is a single fused structure). Their function is
typically to grasp, crush, or cut the insect's food, or to defend against predators or rivals.
What is Hypognathous?
1 :
having the lower jaw longer than the upper
.
2
: having the mouthparts ventrally directed —used especially of certain insects with biting mouthparts directed downward and often somewhat backward — compare prognathous.
Do insects feel pain?
Over 15 years ago, researchers found that insects, and fruit flies in particular, feel something akin to acute pain called “nociception.” When they encounter extreme heat, cold or physically harmful stimuli, they react, much in the same way humans react to pain.
Which insect has Hypognathous head?
Hypognathous : (Hypo-below and gnathous – jaw)
The head remains vertical and is at the right angle to the long axis of the body and mouthparts are ventrally located and projected downwards. This is also known as Orthopteroid type. Eg.
Grasshopper and cockroach
.
Do insects have brains?
Understanding Insect Brains
Insects have tiny brains inside their heads
. They also have little brains known as “ganglia” spread out across their bodies. The insects can see, smell, and sense things quicker than us. Their brains help them feed and sense danger faster, which makes them incredibly hard to kill sometimes.
What are the three segments of an insect?
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.
Do humans have chitin?
Mammals, including mice and humans, do not synthesize chitin but
possess two active chitinases
, chitotriosidase (Chit1) and acidic chitinase (hereafter referred to as “Chia”; alternative name: acidic mammalian chitinase, AMCase) in their genomes
34 , 35
.
What is the head of a bug 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.
What are insect antennae made of?
antenna), sometimes referred to as “feelers”, are paired appendages used for sensing in arthropods. Antennae are connected to the first one or two segments of the arthropod head. They vary widely in form but are always made of
one or more jointed segments
.
Do insects have a neck?
The insect's neck is known as
the cervix
. … In most hemimetabolous insects, the tentorium is constructed from a pair of anterior arms and a pair of posterior arms (each “arm” represents a single apophysis). In some holometabolous insects, there are also a pair of dorsal arms that contribute to the structure.
What does FALX Cerebelli mean?
Medical Definition of falx cerebelli
:
the smaller of the two folds of dura mater separating the hemispheres of the brain that lies between the lateral lobes of the cerebellum
.
