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THE STRUCTURE OF THE BODY The body consists of many parts, all with different functions. The proper functioning of the body depends on the different parts working together. The human body consists of millions of tiny cells of different shapes and sizes each performing a different function. Cells of the same size and function join to form tissue. Two or more types of tissue join to form organs. Organs work with other organs to form systems and systems work together to perform the various functions of the body. Cells Tissue Organs Systems The Human Body THE SYSTEMS OF THE BODY There are ten systems in the Human Body. 1. THE SKELETAL SYSTEM Bones, joints. Provides a rigid framework which supports the body. 2. THE MUSCULAR SYSTEM Muscles, tendons. Moves limbs and drives blood around the body. 3. THE SKIN SYSTEM Skin, nails, hair. Provides a barrier that protects the body and control temperature. 4. THE NERVOUS SYSTEM Brain, spinal cord, nerves. The body’s control centre and communication system. 5. THE RESPIRATORY SYSTEM Nose, windpipe, lungs. Takes in oxygen and removes carbon dioxide and waste. 6. THE CIRCULATORY SYSTEM Blood vessels, heart, blood. Transports blood to cells, removes waste and help fight disease. 7. THE DIGESTIVE SYSTEM Mouth, oesophagus, stomach, intestines, glands. Breaks down food for use inside of the body. 8. EXCRETTORY (URINARY) SYSTEM Kidneys, bladder. Removes waste products as urine. 9. ENDOCRINE SYSTEM Pituitary gland, Thyroid gland, Pancreas, etc. Glands producing hormones that regulate a number of body functions. 10. REPRODUCTIVE SYSTEM Sexual organs, Ovaries and uterus in women. Reproduces TABLE OF THE BODY’S SYSTEMS System Organs of System Main Organ Main Function Skeletal Bones Muscular Bones, cartilage, ligaments, joints Muscles, tendons Skin Skin, nail, hair Skin Respiratory Nose, windpipe, lungs Lungs Circulatory Heart, blood vessels, blood Heart Nervous Brain, spinal cord, nerves Brain Digestive Mouth, oesophagus, stomach, intestines, glands Stomach Provides a rigid framework which supports the body Elastic fibers that moves limbs and drives blood around the body Provides a barrier that protects the body and controls temperature Takes in oxygen to oxygenate the blood and remove carbon dioxide and waste Transports blood to cells, remove wastes, and help fight disease The body’s control centre and communication system Breaks down food for use inside of the body Excretory Kidneys, bladder Kidney Endocrine Pituitary gland Pituitary gland Reproductive Sexual organs Muscles Ovaries, uterus Removes waste products as urine Glands producing hormones that regulate a number of body functions Reproduces