Exchange Surfaces 3 Key Words

Question 1

Diaphragm

Answer 1

Upward-curved, c-shaped muscle & fibrous protein structure separating thoracic cavity from abdomen. Contraction leads to inhalation.

Question 2

Caval opening

Answer 2

Passes through central tendon of diaphragm. Contains inferior vena cava.

Question 3

Pharynx

Answer 3

aka throat, passageway extending skull to sixth cervical vertebrae. Serves respiratory & digestive systems: air from nasal cavity and food, air and water from oral cavity.

Question 4

Larynx

Answer 4

aka voice box, includes vocal cords. 2in tube in adults. Above wind pipe and in front of food pipe.

Question 5

Spiracle

Answer 5

Exoskeleton opening of insects and derived spiders allowing air into trachea

Question 6

Exoskeleton

Answer 6

External skeleton that supports and protects an animal’s body

Question 7

Tracheoles

Answer 7

Fine insect/spider tracheal respiratory tubes, about 1 micrometre diameter, respiratory system part.

Question 8

Chitin

Answer 8

Fibrous polysaccharide substance, arthropod exoskeleton and fungal cell wall component

Question 9

Thorax

Answer 9

One of three main insect body parts, middle segment after head before abdomen

Question 10

Tracheal fluid

Answer 10

Insect fluid at ends of tracheoles, where gas exchange takes place