Lesson Outline:Exercise #1 - Basic FunctionsExercise #2 - Phylogenetic TrendsExercise #3 - Case Studies to Compare
Lesson 17b
Throughout the course what you need to master is an understanding of:
• the form and function of structures,
2) the phylogenetic and ontogenetic origins of structures, and
3) the extend to which various structures are homologous, analogous and/orhomoplastic.
Skull and Visceral Skeleton
Exercise #1 List the basic functions of the skull and visceral skeleton :
The function of the neurocranium is:
The function of the dermatocranium is:
The function of the splanchnocranium is:
Skull and Visceral Skeleton
Exercise #2 Describe the evolutionarytrends that we see in the skull andvisceral skeleton - from the fishes tothe birds and mammals:
Neurocranium
Skull and Visceral Skeleton
Exercise #2 Describe the evolutionarytrends that we see in the skull andvisceral skeleton - from the fishes tothe birds and mammals:
Dermatocranium
Skull and Visceral Skeleton
Exercise #2 Describe the evolutionarytrends that we see in the skull andvisceral skeleton - from the fishes tothe birds and mammals:
Splanchnocranium
Skull and Visceral Skeleton
Exercise #3 – Comparisons – For the following structures:
Case 1
sclera
1) state whether these structures are homologous analogousand/or homoplastic.
2) what their function is.
3) what they develop from and what they have evolved from.
Skull and Visceral Skeleton
Exercise #3 – Comparisons - For the following structures:
Case 2 1) state whether these structures are homologous,analogous and/or homoplastic.
2) what their function is.
3) what they develop from and what they have evolved from.
Skull and Visceral Skeleton
Exercise #3 – Comparisons - For the following structures:
Case 3 1) state whether these structures are homologous,analogous and/or homoplastic.
2) what their function is.
3) what they develop from and what they have evolved from.
Skull and Visceral Skeleton
lower jaw 2nd visceral arch
malleus
Exercise #3 – Comparisons – For the following structures:
Case 4
1) Describe the types of jaw suspension found in each of these groups.
2) what is the significance of the differences we see?
Skull and Visceral Skeleton
Exercise #3
Case 5 How many of the differences in form that you see in this figure can you ascribe to differences in function?
Skull and Visceral Skeleton