Biology, asked by elle05, 6 months ago

List the differences between the single and the double circulatory system. State one advantage that the double circulatory system has over that of the single circulatory system.

Answers

Answered by arthurkimalmacin357
3

Single and Double Circulatory Systems

The animal transport system consists of:

A fluid medium to transport substances (the Blood)

A pump to push the fluid around the body

Specialised exchange surfaces

Most transport systems also contain tubes (Blood Vessels) to hold the blood.

This is the Circulatory System, which is a very efficient transport system.

There are two types of circulatory system:

A Single Circulatory System is a simple loop in which blood flows: Heart > Gills > Body > Heart

A Double Circulatory System is a double loop in which blood flows: Heart > Lungs > Heart > Body > Heart

Fish have a single circulatory system, while mammals have a double circulatory system.

In a double circulatory system, the loop that goes to the lungs is called the Pulmonary Circuit, while the loop that goes to the body is called the Systemic Circuit.

The double circulatory system is advantageous for active animals since, while in the single circulatory system the blood pressure is limited by the delicate nature of the tiny capillaries in the gills, in the double circulatory system the blood pressure can be high in the systemic circuit while remaining low and safe in the pulmonary circuit. This allows animals with a double circulatory system to be more active, since blood can reach their respiring tissues faster due to the higher pressure.

Fish are not as active as other animals, so their single circulatory system is sufficient for their needs, while more active animals like mammals need a double circulatory system.

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