BIOL 211 – CELLULAR AND ORGANISMAL BIOLOGY

Lecture Outline for April 11, 2005

Topic: transport in animals – circulatory systems

Chapter 35 sections 35.1, 35.2

Figures used in lecture: 35.1, 35.2, 35.3, 35.5, 35.8,

Additional Resources

The Circulatory System – this page includes some figures I used in lecture

Transport in Animals

Define/explain: gastrovascular cavity, open circulatory system, closed circulatory systems, pulmonary circulation, systemic circulation, arteries, capillaries, veins,

You should be able to:

1. Describe transport through an animal with:

(a) no circulatory system

(b) open circulatory system

(c) closed circulatory system

2. Describe the differences between open and closed circulatory systems including the advantages of a closed system.

3. Define the difference between pulmonary circulation and systemic circulation and describe the path of blood flow through each.

4. Label the anatomy of a mammalian heart and describe the path of blood flow through the heart.

3 types of circulatory systems in animals:

1. No circulatory system

gastrovascular cavity:

2. Open circulatory system

3. Closed circulatory system

Closed circulatory systems in vertebrates:

a) 2-chambered heart – fish

one atrium, one ventricle

b) 3-chambered heart – amphibians and reptiles

2 atria, one ventricle

c) 4-chambered heart - birds and mammals

2 atria, 2 ventricles

allows for separation of pulmonary circulation and systemic circulation

Pulmonary circulation :

Oxygenated blood :

Deoxygenated blood:

Arteries:

Veins:

Capillaries :

Circulation through the heart

Superior/Inferior vena cava à right atrium à atrioventricular (tricuspid) valve à right ventricle à pulmonary valve à

pulmonary arteries à lungs à Pulmonary veins à left atrium àatrioventricular (biscuspid) valve à left ventricle à

aortic valve à aorta