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Organ Systems of the Body

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Presentation on theme: "Organ Systems of the Body"— Presentation transcript:

1 Organ Systems of the Body
Chapter 4

2 Organ A structure made up of two or more kinds of tissues that can perform a complex function

3 System A group of organs that perform more complex functions than an organ can by itself.

4 Organ Systems of the Body
Integumentary Skeletal Muscular Nervous Endocrine Cardiovascular Lymphatic Respiratory Digestive Urinary Reproductive Male Female

5 Integumentary System Skin- largest and most important organ of this system Accessory Structures Hair Nails Sweat Glands Oil-producing Glands Sense organs- respond to stimuli Skin accounts for 16% of an adult’s body weight. Primary function is protection- bacteria, exposures, etc. Helps to regulate body temperature.

6 Skeletal System Bones Cartilage and Ligaments
206 bones in the human body. Functions: support and protection, movement, storage of minerals and formation of blood

7 Muscular System Muscles Voluntary Involuntary or Smooth Cardiac
Muscles are attached to bones by tendons. Contractions of voluntary and smooth muscles Cardiac is specialized

8 Nervous System Brain, spinal cord, and nerves
Communication between body functions Integration of body functions Control of body functions Recognition of sensory stimuli Functions of the NS are accomplished by nerve impulses. Sense organs react to stimuli and generate impulses to relay info to brain

9 Endocrine System Pituitary gland, pineal gland, hypothalamus, thyroid, parathyroid, thymus, adrenal glands, pancreas, ovaries, and testes Composed of specialized glands and cells that secrete hormones. General functions: communication, integration, and control Think of the Endocrine System like a dial-up internet.

10 Cardiovascular (Circulatory) System
Includes the heart and blood vessels Primary function is transportation, however, it assists in maintaining body temperature Certain blood cells are specialized and assist in the defense of the body or immunity Closed system of blood vessels- arteries, veins, and capillaries

11 Lymphatic System Composed of lymph nodes, lymphatic vessels and lymphatic organs such as tonsils, thymus, and spleen Lymph- whitish, watery fluid that contains lymphocytes, proteins, and some fatty molecules Function: Movement of fluids and certain large molecules Immune system Thymus functions both as an endocrine and lymphatic gland Not a closed system as lymph will eventually enter into the circulatory system

12 Respiratory System Movement of air Gas exchange
Alveoli- tiny, thin-walled sacs in lungs Warms and humidifies Filters Gas exchange Includes the nose, pharynx, larynx, trachea, bronchi and lungs

13 Digestive System Proper digestions and absorption of nutrients
Primary Organs Mouth, pharynx, esophagus, stomach, small and large intestines, rectum and anal canal Forms a continuous tube called the gastrointestinal tract (GI) Accessory Organs Teeth, salivary glands, tongue, liver, gallbladder, pancreas, and appendix Accessory organs provide the mechanical or chemical breakdown of food Mention appendix

14 Urinary System Kidneys, ureters, bladder, and urethra Kidneys Urine
Clean the blood of waste products Maintain balance of electrolytes, water and acid-base (pH) Urine Waste product produced by the kidneys

15 Reproductive Systems Male Gonads Testes: produce sperm Genital Ducts
Vas deferens Accessory Organs prostate Genitalia Penis Scrotum

16 Reproductive Systems Female Gonads Accessory Organs Genitalia
Ovaries: produces eggs (ova) Accessory Organs Uterus, fallopian tubes, vagina Breast and/or mammary glands Genitalia Vulva

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