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Flashcards in Head and Mouthparts Deck (15)
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1

Sclerites

Plates of chemically hardened integument (Natural covering)

2

Suture

Line or groove marking the union of two sclerites, or a line of weakness across a sclerite

3

Sulcus

Line marking an internal ridge or cuticle arising from an invagination or infolding

4

Apodeme

An internal ridge of cuticle

5

Where is segmentation readily apparent?

Everywhere on the body except on the head

6

Why is segmentation not readily apparent on the head?

The segments have become fused to form a continuous head capsule (more or less)

7

What are the 6 segments of the head?

1. Labral
2. Antennal
3. Postantennal (or Intercalary)
4. Mandibular
5. Maxillary
6. Labial

8

What is the Labrum?

Functions like an upper lip

9

What are the Mandibles?

Teeth for chewing food

10

What is the Hypopharynx?

Functions like a tongue

11

What are the Maxillae?

Appendages that hold and guide food for the mandibles. Also possess sensory palps.

12

What is the Labium?

Functions like a lower lip. Also possesses a pair of sensory palps

13

What are some functions of the mouthparts? (different kinds of mouthparts) (6)

1. Chewing
2. Piercing and Sucking
3. Sponging
4. Rasping and Sucking
5. Siphoning
6. Chewing and lapping

14

What are the three orientations of insect mouthparts? (Names) What are their orientations?

1. Hypognathous - projecting downwards
2. Prognathous - Projecting forwards
3. Opisthognathous - Projecting rearwards

15

What are some sensory structures on the head? What are they used for? (4)

1. Compound eyes - vision/image formation
2. Ocelli - Light perception
3. Antennae - Olfacation (smell)
4. Maxillary and Labial palps - Gustation (Eating)