Arthropoda practical

Question 1

Exoskeleton

Answer 1

Covering of the animal

Question 2

Cephalothorax

Answer 2

The first segment of the body

Question 3

Carapace

Answer 3

Hard covering protecting the cephalothorax

Question 4

Cervical groove

Answer 4

Marks the head-thorax fusion line; In between the two segments

Question 5

Branchiostegites

Answer 5

Gill cover, 2 large flaps on the side of the body; contains the gill chamber and feathery gills

Question 6

Gills

Answer 6

Contained in the Gill chamber; gaseous exchange and respiration

Question 7

Rostrum

Answer 7

Small extension out of the head

Question 8

Eyes

Answer 8

Under the rostrum; sense organ (light)

Question 9

Antennae

Answer 9

Protrudes out in front of the face; sense organ (touch)

Question 10

Maxillipeds

Answer 10

First 3 appendage pairs; touch, taste, and food handling

Question 11

Walking legs

Answer 11

Last 5 appendage pairs; movement and defense

Question 12

Abdomen

Answer 12

Bottom segment of the body; made up of six segments

Question 13

Swimmerets (pleopods)

Answer 13

First 5 segments of the abdomen; Place of attachment for eggs and movement (swimming)

Question 14

Telson

Answer 14

6th, flat segment of the abdomen; contains the anus and uropods

Question 15

Anus

Answer 15

Central part of the telson; Site of excretion

Question 16

Uropods

Answer 16

2 pairs fanned on the outside of the telson; movement and egg protection

Question 17

Genital openings

Answer 17

At the base of each 5th walking leg for males and the base of each 3rd walking leg for females; site of reproduction

Question 18

How is the exoskeleton created?

Answer 18

Made by the epidermis layer and hardened by chitin and mineral salts