Form To Function Circulation

Question 1

What is the biggest difference between the four tetrapod circulatory systems?

Answer 1

The Pump

Question 2

How many chambers does each type of circulatory system have?

Answer 2

Ectotherm hearts: 3 chambers

Endotherm hearts: 4 chambers

Question 3

What is different between amphibian and reptilian hearts?

Answer 3

Reptilian hearts are partially divided (Increased efficiency)

Question 4

What is the exception to reptilian 3 chambered hearts?

Answer 4

Crocodilians have 4 chambered hearts

Question 5

What are the two separate circuits in 4 chambered hearts and how do they vary?

Answer 5

Systemic Circuit: Heart to Body (High pressure)

Pulmonary Circuit: Heart to lungs (Low pressure)

Question 6

What special consideration does the aves heart need?

Why?

Answer 6

Twice the size of a similar sized mammal (compensated by smaller lungs)
Higher metabolism

Question 7

What is the relationship between metabolism, body size and heart rate?

Answer 7

As body size decreases, metabolism and heart rate increases