Life on Earth: At a Glance

Life on Earth
Audesirk & Audesirk
Prentice-Hall, Inc.

The Human Circulatory System: The vertebrate heart consists of muscular chambers whose contraction is controlled by electrical impulses.
Blood transports dissolved nutrients, wastes, and hormones throughout the body.
The blood vessels carry blood to all parts of the body.

The Lymphatic System
Lymphatic vessels resemble the veins and capillaries of the circulatory system.
The lymphatic system returns fluids to the blood.
The lymphatic system transports fats from the intestine to the blood.
The lymphatic system helps defend the body against disease.

Respiratory Systems Facilitate Gas Exchange by Diffusion

The Human Respiratory System
The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; Blood transports dissolved nutrients, wastes, and hormones throughout the body.
The blood vessels carry blood to all parts of the body.

The Lymphatic System
Lymphatic vessels resemble the veins and capillaries of the circulatory system.
The lymphatic system returns fluids to the blood.
The lymphatic system transports fats from the intestine to the blood.
The lymphatic system helps defend the body against disease.

Respiratory Systems Facilitate Gas Exchange by Diffusion

The Human Respiratory System
The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; The blood vessels carry blood to all parts of the body.

The Lymphatic System
Lymphatic vessels resemble the veins and capillaries of the circulatory system.
The lymphatic system returns fluids to the blood.
The lymphatic system transports fats from the intestine to the blood.
The lymphatic system helps defend the body against disease.

Respiratory Systems Facilitate Gas Exchange by Diffusion

The Human Respiratory System
The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.
The Lymphatic System: Lymphatic vessels resemble the veins and capillaries of the circulatory system.
The lymphatic system returns fluids to the blood.
The lymphatic system transports fats from the intestine to the blood.
The lymphatic system helps defend the body against disease.

Respiratory Systems Facilitate Gas Exchange by Diffusion

The Human Respiratory System
The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; The lymphatic system returns fluids to the blood.
The lymphatic system transports fats from the intestine to the blood.
The lymphatic system helps defend the body against disease.

Respiratory Systems Facilitate Gas Exchange by Diffusion

The Human Respiratory System
The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; The lymphatic system transports fats from the intestine to the blood.
The lymphatic system helps defend the body against disease.

Respiratory Systems Facilitate Gas Exchange by Diffusion

The Human Respiratory System
The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; The lymphatic system helps defend the body against disease.

Respiratory Systems Facilitate Gas Exchange by Diffusion

The Human Respiratory System
The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.
Respiratory Systems Facilitate Gas Exchange by Diffusion
The Human Respiratory System: The conducting portion of the respiratory system carries air to the lungs.
Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; Gas exchange occurs in the alveoli.
Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; Oxygen and carbon dioxide are transported using different mechanisms.
Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; Air is inhaled actively and exhaled passively.
Breathing rate is controlled by the respiratory center of the brain.; Breathing rate is controlled by the respiratory center of the brain.

Designed in cooperation with Andrew Stull and Steven Brunasso.

Last Update - July 25, 1997