The Insect Body

Question 1

What are the members of Arthropoda

Answer 1

Insects, crustaceans, arachnids (spiders, scorpions, mites …)

Question 2

What type of skeleton do arthropods have

Answer 2

An exoskeleton of hard, chitin-containing shell divides into plates joined together by thin membranes

Question 3

How is the insect’s nervous system different than ours

Answer 3

The nerve cord runs along the lower part of the insect (ventral side)

Question 4

Describe the insects circulatory system

Answer 4

A simple pipe which has a part that pumps blood into the body cavity where it bathed the internal organs and facilitates exchange
The blood is nearly always greenish and lack hemoglobin

Question 5

how do insects breath

Answer 5

they take in air through numerous holes along the abdomen and thorax called spiracles or stigmata
theses open into a tubular respiratory system that branches throughout the body
also connected to several air sacs which pump air as a result of the body moving

Question 6

where are some of the insects sense organs located

Answer 6

the hearing organ is sometimes on the upper leg
smell and taste in the feet, lower leg, and antennae, eyes may be on the neck

Question 7

how many legs do insects have

Answer 7

6

Question 8

what are the segments of an insects body

Answer 8

the head, thorax, and abdomen

Question 9

how might insects have evolved

Answer 9

from a millipede like ancestor, that, over time, had segments combine and modify into the 3 segments along with mouth parts, wings, and other body parts

Question 10

describe the insect wing

Answer 10

outgrowths of the body wall found in some insects that permit flight
highly variable
operated by wing musculature in the thorax

Question 11

what is venation

Answer 11

the course and arrangement of veins in the wings of an insect
used to identify insects frequently

Question 12

describe insect legs

Answer 12

a slender and rigid appendage specially adapted to jumping, climbing, swimming, clinging, seizing prey, digging, spinning, or whatever else is needed by the insect
subdivided

Question 13

what are the divisions of the insect leg

Answer 13

a coxa, a trochanter, a femur, a trivia, and a tarsus (further subdivided)

Question 14

what is often found on the insect leg

Answer 14

sensory organs along with refined mechanisms for cleaning the body, gathering food, injecting fluid, or applying suction

Question 15

what is a pulvillus

Answer 15

an adhesive lobe that lies beneath the claws of the tarsus and serves the clinging to smooth surfaces

Question 16

describe the feelers or antennae of an insect

Answer 16

appendages that are covered in tens of thousands of sensors hairs and pits to detect various stimulus

Question 17

what type of eyes do insects have

Answer 17

compound eyes that are globular and have a honeycomb like structure, each honeycomb is the upper cuticle of an individual organ of sight, a long slender cylinder that narrows as it goes inwards

Question 18

what is just beneath the cuticular cornea

Answer 18

a lens, a long crystalline cone which at the lower end of which les a rod-shaped bundle of 7-14 retinal cells connected to an optic nerve fiber

Question 19

what are the secondary eyes some insects have

Answer 19

little frontal eyes or dorsal ocelli that lie between the compound eyes
usually 3
made of a curving cornea, lens, iris, a vitreous body, a retina, and darkly pigmented wall
perceive light but not images

Question 20

what does an insect see

Answer 20

a non reversed mosaic of the light falling on each facet of the eye, the more there are the clearer and sharper the picture each
no idea how the brain interprets the image

Question 21

what colours do insects see

Answer 21

ultra violet, blue, yellow, and blue green

Question 22

what kind of light can insects see but we cannot

Answer 22

polarized light, which is produced when sunlight passes through the atmosphere

Question 23

how do insects navigate

Answer 23

the sky (polarized Light gives the sky a non-uniform appearance)
and the sun mainly

Question 24

what are insect instruments

Answer 24

the endless variation of the insects’ mouth and mouthparts allows them to feed and accomplish whatever other ambitions they might have
highly refined instruments in the abdomen allow insects to sting and lay eggs

Question 25

how do insects communicate

Answer 25

signs, sounds, songs, dances

Question 26

how do insects reproduce

Answer 26

generally by mating but also by parthenogenesis where only a unfertilized female lays eggs