IB Biology Topic B3.2.14 Differences Between Circulation of Bony Fish and of Mammals Revision Notes (HL)

IB Biology Topic B3.2.14 Differences Between Circulation of Bony Fish and of Mammals Revision Notes (HL) | RevisionDojo

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Single vs Double Circulation: Why Body Plan Follows Metabolic Demand

Circulatory systems vary with an animal's metabolic demands and environment.
Bony fish use a single circulation, while mammals use a double circulation that sustains a much more active lifestyle.

Single Circulation in Bony Fish: Blood Passes Through the Heart Once

Definition

Single circulation

A type of circulatory system in which blood flows through the heart once per complete circuit.

In bony fish, blood passes through the heart only once per complete circuit.
The heart has just one atrium and one ventricle.
Blood Flow Sequence in Bony Fish
1. Oxygen-poor blood from the body returns to the heart, entering the atrium and then the ventricle.
2. The ventricle pumps blood to the gills, where it picks up oxygen and releases carbon dioxide.
3. Oxygen-rich blood then flows from the gills straight to the rest of the body.
4. Finally the blood returns to the heart to complete the single loop.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Single vs Double Circulation: Why Body Plan Follows Metabolic Demand

Circulatory systems vary with an animal's metabolic demands and environment.
Bony fish use a single circulation, while mammals use a double circulation that sustains a much more active lifestyle.

Single Circulation in Bony Fish: Blood Passes Through the Heart Once

Definition

Single circulation

A type of circulatory system in which blood flows through the heart once per complete circuit.

In bony fish, blood passes through the heart only once per complete circuit.
The heart has just one atrium and one ventricle.
Blood Flow Sequence in Bony Fish
1. Oxygen-poor blood from the body returns to the heart, entering the atrium and then the ventricle.
2. The ventricle pumps blood to the gills, where it picks up oxygen and releases carbon dioxide.
3. Oxygen-rich blood then flows from the gills straight to the rest of the body.
4. Finally the blood returns to the heart to complete the single loop.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic B3.2.14: Differences Between Circulation of Bony Fish and of Mammals Notes

Single vs Double Circulation: Why Body Plan Follows Metabolic Demand

Single Circulation in Bony Fish: Blood Passes Through the Heart Once

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Single vs Double Circulation: Why Body Plan Follows Metabolic Demand

Single Circulation in Bony Fish: Blood Passes Through the Heart Once

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics