BIOL2311- Exam 1 Objectives

Human Heart Anatomy & Comparative Circulatory Systems

Open circulatory system

blood not exclusively enclosed in vessels; pumped into cavity called the hemocoel

Lower Pressure (lack of confinement)

Closed circulatory system

blood pumped through vessels

High Pressure

Lymph

watery fluid bathing tissue and organs with protective white blood cells; erythrocyte containing

Hemolymph

mixture of blood and interstitial fluid; found in open circulatory systems

Heart = _____ for blood circulation

Pump

Vessels

Make up circulatory system via network (arteries, veins, and capillaries)

Closed circulatory system contains:

vessels, heart

Open circulatory system contains:

hemocoel, hemolymph, heart

1

aorta

2

pulmonary artery

3

left ventricle

4

left atrium

5

right atrium

6

inferior vena cava

7

right ventricle

8

pulmonary vein

9

superior vena cava

moves deoxygenated blood to lungs

Pulmonary System

(move between heart and lungs)

moves oxygenated blood around body

Systemic System

(rest of the body)

Fish Circulatory System

Chambers: 2

Oxygen Source: Gills

Systemic only

Amphibian Circulatory System

Chambers: 3

Oxygen Source: Skin and Lungs

Systemic & Pulmonary

Separation of oxygenated & deoxygenated

Reptile Circulatory System

Chambers: 3

Oxygen Source: Lungs

Systemic & Pulmonary

Some mixing of oxygenated & deoxygenated

Bird Circulatory System

Chambers: 4

Oxygen Source: Lungs

Systemic & Pulmonary

Separation of oxygenated & deoxygenated blood