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Questions and Answers
What is the primary function of the muscular system in the human body?
To enable the body to move using muscles
What is the role of the nervous system in relation to the senses and physical actions?
To collect and process information from the senses and tell the muscles to contract to cause physical actions
What is the main function of the renal system and urinary system?
To filter blood to produce urine and get rid of waste
What is the primary purpose of the reproductive system?
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What is the primary function of the respiratory system?
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What is the primary function of the skeletal system?
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Approximately how many bones are in the human body at birth?
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What is the approximate volume of blood in a 150-180 pound adult human body?
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Study Notes
Body Systems
Muscular System
- Enables the body to move using muscles.
Nervous System
- Collects and processes information from the senses via nerves and the brain.
- Tells the muscles to contract to cause physical actions.
Renal System and Urinary System
- The kidneys filter blood to produce urine and get rid of waste.
Reproductive System
- The reproductive organs required for the production of offspring.
Respiratory System
- Brings air into and out of the lungs to absorb oxygen and remove carbon dioxide.
Skeletal System
- Bones maintain the structure of the body and its organs.
Interesting Facts
- The human body has around 270 bones at birth, decreasing to around 206 bones by adulthood after some bones fuse together.
- Bone mass in the skeleton reaches maximum density around age 21.
- The human body contains approximately 37.2 trillion cells.
- There are over 650 named skeletal muscles in the human body, with some estimates as high as 840.
- The network of blood vessels would measure over 60,000 miles in length if laid out in a line.
- The volume of blood in a human body is approximately 7% of body weight.
- An average adult body with a weight of 150-180 pounds contains approximately 4.7-5.5 liters (1.2-1.5 gallons) of blood.
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Description
Test your knowledge of the human body systems, including muscular, nervous, renal, reproductive, and respiratory systems.
