Human body systems
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Human Body Systems. Organization of The Body. The eleven organ systems of the human body work together to maintain homeostasis Homeostasis – process which organisms maintain a relatively stable internal environment. Human Organ Systems. Figure 35-2 Human Organ Systems Part I. Section 35-1.

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Human Body Systems

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Human body systems

Human Body Systems


Organization of the body

Organization of The Body

  • The eleven organ systems of the human body work together to maintain homeostasis

  • Homeostasis – process which organisms maintain a relatively stable internal environment


Human organ systems

Human Organ Systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Human body systems

Figure 35-2 Human Organ Systems Part 2

Section 35-1

Respiratory System

Digestive System

Excretory System

Endocrine System

Reproductive System

Lymphatic System


Nervous system

Nervous System

  • Brain, Spinal cord, periperal nerves

  • Function: Coordinates the body’s response to changes in its internal and external environments


Nervous system1

Nervous System

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Integumentary system

Integumentary System

  • Skin, hair, nails sweat and oil glands

  • Function: Serves as a barrier against infection and injury; helps to regulate body temperature; provides protection against ultraviolet radiation from the sun


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Respiratory system

Respiratory System

  • Nose, pharynx, larynx, trachea, bronchi, bronchiales, lungs

  • Function: Provides oxygen needed for cellular respiration and remove excess carbon dioxide from the body


Human body systems

Figure 35-2 Human Organ Systems Part 2

Section 35-1

Respiratory System

Digestive System

Excretory System

Endocrine System

Reproductive System

Lymphatic System


Digestive system

Digestive System

  • Mouth, pharynx, esophagus, stomach, small and large intestine

  • Function: Converts foods into simpler molecules that can be used by the cells of the body; absorbs food


Human body systems

Figure 35-2 Human Organ Systems Part 2

Section 35-1

Respiratory System

Digestive System

Excretory System

Endocrine System

Reproductive System

Lymphatic System


Excretory system

Excretory System

  • Skin, lungs, kidneys, ureters, urinary bladder, urethra

  • Function: Eliminates waste products of metabolism from the body; maintains homeostasis


Human body systems

Figure 35-2 Human Organ Systems Part 2

Section 35-1

Respiratory System

Digestive System

Excretory System

Endocrine System

Reproductive System

Lymphatic System


Skeletal system

Skeletal System

  • Bones, cartilage, ligaments, tendons

  • Function: Supports the body; protects internal organs; allows movement; stores mineral reserves; provides a site for blood cell formation


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Muscular system

Muscular System

  • Skeletal muscle, smooth muscle, cardiac muscle

  • Function: Works with skeletal system to produce voluntary movement; helps to circulate blood and move food through the digestive system


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Circulatory system

Circulatory System

  • Heart, Blood vessels, blood

  • Function: Brings oxygen, nutrients, and hormones to cells; fights infection; regulates body temperature


Human body systems

Figure 35-2 Human Organ Systems Part I

Section 35-1

Nervous System

Integumentary System

Skeletal System

Muscular System

Circulatory System


Endocrine system

Endocrine System

  • Hypothalamus, pituitary, thyroid, parathyroids, adrenals, pancreas, ovaries(in females), testes (in males)

  • Function: Controls growth, development, metabolism, and reproduction


Human body systems

Figure 35-2 Human Organ Systems Part 2

Section 35-1

Respiratory System

Digestive System

Excretory System

Endocrine System

Reproductive System

Lymphatic System


Reproductive system

Reproductive System

  • Testes, epididymis, vas deferens, urethra, and penis (in males); Ovaries, fallopian tubes, uterus, vagina (in females).

  • Produces reproductive cells; in females, nurtures and protects developing embryo


Human body systems

Figure 35-2 Human Organ Systems Part 2

Section 35-1

Respiratory System

Digestive System

Excretory System

Endocrine System

Reproductive System

Lymphatic System


Lymphatic system

Lymphatic System

  • White blood cells, thymus, spleen, lymph nodes, lymph vessels

  • Helps protect the body from disease; collects fluid lost from blood vessels and returns the fluid to the circulatory system.


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