BIO 203 Study Guide - Quiz Guide: Sinus Venosus, Circulatory System, Blackboard

• School: Stony Brook University
• Department: Biology
• Course: BIO 203
• Professor: A L L

Document Summary

Here is a good answer from one of your classmates that will receive full points for this assignment. The only minor thing that i would change about it is to acknowledge that fish can get very big (e. g. whale sharks), so the size difference between fish and humans is probably not a major factor driving heart evolution. Rather, the different environments that these animals live in (aquatic vs terrestrial) is likely the biggest factor. Nonetheless, this is a thoughtful answer that clearly explains the circulatory systems and why they might have evolved this way. Choose one non-human animal from the vertebrate circulatorium (link on blackboard): hagfish, A major difference between the heart of the fish and a human heart is that the fish has a two-chambered heart instead of a four-chambered heart, and the heart receives and pumps deoxygenated blood only.