Chordata Phylum (Classes)

Question 1

What is the class Agnatha.

Answer 1

Lampreys

Jawless fish
Skin
Uncovered gill slits
2 chamber heart
Ectothermic
External fertilization

Question 2

What is the class Chondrichthyes.

Answer 2

Sharks

Cartilaginous fish
Skeleton made of cartilage
A biting jaw
Paired fins
Lateral line allowing to sense water current changes

Question 3

What is the class Osteichthryes.

Answer 3

Bony fish
Swim bladder
Paired fins
External reproduction

2 types:
Ray finned: normal fish
Lobe finned: walking fish

Question 4

What is the class amphibia.

Answer 4

External fertilization in water
Larves does metamorphosis
Have gills as larves and lungs as adult
Moist skin aid in respiration
3 chamber heart
Ectothermic
Live in both water and land

Question 5

What is the class reptilia.

Answer 5

Dry skin
Limbs beneath body
3 chamber heart
Amniotic egg (shell)

Question 6

What is the class aves.

Answer 6

Wings for flight
Bubble bones for weight during flight
4 chamber heart
Air sacs in lungs
Endothermic

Question 7

What is the mammalia class.

Answer 7

Skin covered by hair
Embryo development
Produce milk (mammary glands)
Sweat glands
Well developed brain

Three groups:
1. Monotreme (platypus): eggs
2. Marsupial (auzzie): babies chill in pouch
3. Placenta: holds baby in mom