The Human Body Body Systems (3of 3)

4: The Human Body 2 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

4: The Human Body 3 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

4: The Human Body 4 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

4: The Human Body 5 Central Nervous System (2 of 2)

4: The Human Body 6 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.

4: The Human Body 7 The Skin (1 of 2) Protects the body from the environment Regulates body temperature Transmits information from environment to the brain

4: The Human Body 8 The Skin (2 of 2)

4: The Human Body 9 Endocrine System Complex message and control system Made up of 7 glands Glands produce and release hormones.

4: The Human Body 10 Endocrine Glands Adrenal Ovary Pancreas Parathyroid Pituitary Testes Thyroid

4: The Human Body 11 Digestive System Mouth Salivary glands Oropharynx Esophagus Stomach Pancreas Liver Bile ducts Small intestine Large intestine Appendix Rectum