CK-12 Foundation
Ck 12: Episd: Muscle Contraction
[Free Registration/Login may be required to access all resource tools.] Find out how the sliding filament theory explains the way muscles contract.
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Ck 12: Episd: Skin
[Free Registration/Login may be required to access all resource tools.] Find out the structure and function of skin and identify common skin problems.
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Ck 12: Episd: Nails and Hair
[Free Registration/Login may be required to access all resource tools.] What exactly do nails and hair do? Find out the structure and function of both in this module.
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Ck 12: Episd: Nerve Cells
[Free Registration/Login may be required to access all resource tools.] Understand the structure of a neuron and identify different types of them.
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Ck 12: Nerve Impulses
[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will explain how nerve impulses are transmitted.
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Ck 12: Central Nervous System
[Free Registration/Login may be required to access all resource tools.] In this online lesson students will learn an overview of the human skeleton and its functions.
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Ck 12: Peripheral Nervous System
[Free Registration/Login may be required to access all resource tools.] In this interactive lesson students will describe the two major divisions of the peripheral nervous system and their functions.
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Ck 12: Senses
[Free Registration/Login may be required to access all resource tools.] The following online tutorial explains how sensory stimuli are perceived and interpreted.
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Ck 12: Drugs and the Nervous System
[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will learn how drugs affect the nervous system.
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Ck 12: Nervous System Disorders
[Free Registration/Login may be required to access all resource tools.] This online lesson helps students identify nervous system disorders.
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Ck 12: Glands
[Free Registration/Login may be required to access all resource tools.] In this online lesson students will list the glands of the endocrine system and their effects.
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Ck 12: Hormones
[Free Registration/Login may be required to access all resource tools.] In the following online lesson students will learn to explain how hormones work by binding to receptors of target cells.
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Ck 12: Hormone Regulation
[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will learn to describe feedback mechanisms that regulate hormone secretion.
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Ck 12: Endocrine System Disorders
[Free Registration/Login may be required to access all resource tools.] In the following online lesson students will be asked to identify general problems and diseases associated with the endocrine system.
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Ck 12: Heart
[Free Registration/Login may be required to access all resource tools.] In the following online lesson students will explain how the heart pumps blood throughout the body.
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Ck 12: Blood Vessels
[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will learn how to compare different types of blood vessels and their roles.
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Ck 12: Circulatory System Diseases
[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will begin to understand and define cardiovascular disease, and list its risk factors.
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Ck 12: Blood
[Free Registration/Login may be required to access all resource tools.] In this interactive tutorial students will learn to explain how the heart pumps blood throughout the body. Students will explain the composition of blood and will...
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Ck 12: Respiration
[Free Registration/Login may be required to access all resource tools.] In the following learning module students will begin tol define respiration, and explain how it differs from cellular respiration.
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Ck 12: Respiratory System Organs
[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will identify the organs of the respiratory system.
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Ck 12: Processes of Breathing
[Free Registration/Login may be required to access all resource tools.] In the following online lesson students will explain the processes of ventilation, gas exchange, and gas transport. Students will describe the role of gas exchange...
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Ck 12: Respiratory System Regulation
[Free Registration/Login may be required to access all resource tools.] In the following online lesson students will explain how the rate of breathing is regulated.
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Ck 12: Respiratory System Diseases
[Free Registration/Login may be required to access all resource tools.] In this online lesson students will identify diseases of the respiratory system.
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Ck 12: Digestive System Organs
[Free Registration/Login may be required to access all resource tools.] In the following online lesson students will identify the organs and functions of the digestive system.