TAMU ENTO 201 Lab Practical 1 Medina

What are the five classes of arthropod?

- Crustacea
- Arachnida
- Insecta
- Chilopoda
- Diplopoda

How many body segments do arthropods have?

2 to 3

How many body segments do insects have?

3

How many body segments do crustacea have?

2

How many body segments do diplopoda have?

2

How many body segments do chilopoda have?

2

How many body segments do arachnida have?

2

How many leg pairs do arachnida have?

4

How many leg pairs do insecta have?

3

How many leg pairs do crustacea have?

5+

How many leg pairs do diplopoda have?

2 pair per segment

How many leg pairs do chilopoda have?

1 pair per segment

How many antennae do arachnida have?

0

How many antennae do crustacea have?

2 pairs

How many antennae do insecta have?

1 pair

How many antennae do diplopoda have?

1 pair

How many antennae do chilopoda have?

1 pair

Define: ommatidium

compound eye comprised of individual photo receptor units

Define: Ocellus

Simple eye consisting of a single lens

What type of eyes do arachnida have?

Simple

What type of eyes do crustacea have?

Compound

What type of eyes do insecta have?

Can have compound and simple eyes

What type of eyes do chilopoda have?

simple

What type of eyes do diplopoda have?

simple

What is the proper name for the "upper lip" of insects?

Labrum

What is the proper name for the "jaws" of insects?

Mandibles

What is the proper name for the "tongue" of insects?

hypopharynx

What is the purpose of insect maxillae?

orient food during consumption

How many segments do insect legs have?

5

What is the purpose of the foregut (Alimentary canal)

Early digestion and nutrient uptake

What are the three major parts of the foregut?

The esophagus, crop, and proventriculus

The crop is primarily used for ____________.

Food storage

What are the sections of the midgut?

Gastric caeca and ventriculus

Which section of the insect digestive tract is NOT lined with a cuticle?

The midgut

What is the major function of the midgut?

Digestion

What is the purpose of the insect rectum?

water reabsorption

What is the main function of the hindgut

Excretion

What are the major parts of the hindgut

Malpighian tubules, Ileum, Colon, Rectum, and anus

What is the function of the malpighian tubules

absorption from hemolymph (kidneys)

Grasshopper mouthparts

Grasshopper external anatomy

Grasshopper internal anatomy

Grasshopper leg anatomy