Lecture 1 Flashcards Preview

Comp Vert Anatomy Fall 2016 > Lecture 1 > Flashcards

Flashcards in Lecture 1 Deck (22)
Loading flashcards...
1

What are the 3 subphyla of the phylum Chordata?

1. Cephalochordata
2. Urochordata
3. Vertbrata

2

What is the major characteristic of the subphylum cephalochordata?

Include Cephalochordates or lancelets. Ex: amphioxus, genus Branchiostomata

3

Whats the major characteristic of the subphylum Urochordata?

These include ascidians (sea squirts), thaliaceans, and larvaceans, all of which are SMALL MARINE ORGANISMS

4

What are the major characteristics of subphylum Vertebrata?

All the characteristics that make US Vertebrates

5

What are the major classes of subphylum Vertebrata??

Pisces and Tetrapods

6

The major class, Pisces, contains what?

contains all the fishes

7

What are the characteristics of the Class Agnatha?

Jawless, and lacks paired appendages.

Ex. Hagfish and freshwater lampreys

8

What are the characteristics of the Class Acanthodii?

"spiny sharks", not really sharks, but do have spines.
FIRST VERTEBRATES WITH JAWS

9

Which Class of Vertebrates does not have a jaw?

Agnatha

10

The Placodermi are known to have these two features:

jaws and paired fins.

11

The Chondrichthyes have these characteristics:

lack ability to form bone, skeletal system is made entirely of cartilage.

Related to sharks, skates, and rays

12

Osteichthyes:

Largest number of species of fishes, They have a skeletal system formed from bone, but many still retain a considerable amount of cartilage w/in their sk. system

13

What makes the Class Mammalia different from the other Tetrapod classes?

presence of hair and mammary glands

14

Class Aves have what special feature?

feathers

15

What are the characteristics of phylum Chordata that may be shared with members of the invertebrate phyla?

1. Cephalization
2. complete digestive tract
3. Bilateral symmetry
4. Metamerism
5. Triploblasy
6. Eucoelomate body cavity
7. Closed circulatory system
8. Deuterostomy

16

Big Three (four) chordate characteristics:

1. Dorsal hollow nerve chord
2. Pharyngeal "gill" slits, arches and pouches
3. NOTOCHORD
4. Post-anal tail

**Don't have to be present in the adult, but must be present in the embryo or larva.

17

Major characteristics of subphylum vertebrata

1. vertebral column **ONLY FOUND IN VERTEBRATES

18

Why would the notochord be retained to some degree in vertebrates such as fishes and salamanders?

Because it allows for more flexibility and undulating movements of swimming.

19

where can the remnants of the notochord be found in humans?

Nucleus Pulposus, part of the vertebral disk system.

20

All modern vertebrates except ____________ have two pairs of appendages

cyclostomes

21

Three basic differences between the three chordate subphyla:

.

22

L/O #7: Describe axes, etc.

If you are using these cards, I did not make cards for any anatomical landmarks, planes, or motions which I already know. Sorry