Chapter 29, Problem 9A

Summary Introduction

To write:

A table that lists the given structures, their functions and an analogy of what that structure is like in the world of human-made devices.

Introduction:

Reptiles are fully adapted to life on earth. Characteristics that enable reptiles to survive on land include scaly skin, shelled egg, and more effective respiratory and circulatory systems. The dry skin of the reptiles prevents them from losing internal fluids to the air. A layer of scales on the outside of many reptiles also prevents them from drying out.

Explanation of Solution

All the organs like amnion, ventricle, bladder, Jacobson's organ, carapace, plastron and kidneys are found in the body of reptiles. An amnion is a membrane that covers the embryo during development. Ventricle is a chamber of heart that pumps blood through the body. Bladder is the organ that stores urine. Jacobson's organ is a sac like structure in snakes that sense odors. Carapace is the dorsal part of protective shell and plastron is the ventral part of the protective shell found in turtles. Kidney is the excretory organ that filters the blood to remove waste products. The function and analogy of the given organs are listed below.

Organ	Function	Analogy
Amnion	Protect embryo	Shock absorbers
Ventricle	Pumps blood through the body	Motor pump
Bladder	Storage	Bags
Jacobson's organ	Sense of smell	Perfume
Carapace	Protective cover	Clothes
Plastron	Hard shell for protection	Sweater
Kidney	Excretion	Dialyzer

Conclusion

Thus, the different organs in reptiles can do different works to survive on land include amnion, ventricle, bladder, Jacobson's organ, carapace, plastron, and kidney.