Fun facts and terminology about the major human body systems for general audiences.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- How many bones does an adult human have?
- 206
- What is the name of the flexible tissue that connects bones?
- Cartilage
- Which is the strongest bone in the human body?
- Femur (thighbone)
- What does the skeletal system store besides support for the body?
- Minerals (calcium and phosphorus) and bone marrow
- How many muscles does the human body have?
- Over 600
- What molecule do muscles need to contract?
- ATP (adenosine triphosphate)
- Which muscle is the primary one involved in chewing?
- Masseter
- What percentage of body weight do muscles make up?
- About 40 percent
- Into how many main parts is the nervous system divided?
- Two (central and peripheral)
- What is the main organ of the central nervous system?
- Brain
- What chemical signals transmit information between neurons?
- Neurotransmitters
- At what speed do nerve impulses travel?
- About 120 meters per second
- What gas do red blood cells transport?
- Oxygen
- How many chambers does the human heart have?
- Four
- What is the largest artery in the body?
- Aorta