The Human Body

Body Systems(3of 3)

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4: The Human Body

Physiology of the Circulatory System (1 of 2)

• Pulse

• The wave of blood through the arteries formed when the left ventricle contracts

• Can be felt where an artery passes near the skin surface and over a bone

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Physiology of the Circulatory System (2 of 2)

• Blood pressure• Amount of force exerted against walls of

arteries• Systole: Left ventricle contracts• Diastole: Left ventricle relaxes

• Perfusion• Circulation of blood within an organ or

tissue• If inadequate, the patient goes into shock

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4: The Human Body

The Nervous System

• The nervous system controls the body’s voluntary and involuntary actions.

• Somatic nervous system

• Regulates voluntary actions

• Autonomic nervous system

• Controls involuntary body functions

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4: The Human Body

Central Nervous System (2 of 2)

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4: The Human Body

Peripheral Nervous System

• Links the organs of the body to the central nervous system.

• Sensory nerves carry information from the body to the central nervous system.

• Motor nerves carry information from the central nervous system to the muscles of the body.

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4: The Human Body

The Skin (1 of 2)

• Protects the body from the environment

• Regulates body temperature

• Transmits information from environment to the brain

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4: The Human Body

The Skin (2 of 2)

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4: The Human Body

Endocrine System• Complex message and control

system

• Made up of 7 glands

• Glands produce and release hormones.

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4: The Human Body

Endocrine Glands

• Adrenal

• Ovary

• Pancreas

• Parathyroid

• Pituitary

• Testes

• Thyroid

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4: The Human Body

Digestive System• Mouth

• Salivary glands

• Oropharynx

• Esophagus

• Stomach

• Pancreas

• Liver

• Bile ducts

• Small intestine

• Large intestine

• Appendix

• Rectum