Human Body Systems Flashcards
Grade 3 · Science · Flashcards
Study the major human body systems and their key organs.
Flashcards
- organ
- A body structure made of tissues that performs a specific function
- organ system
- A group of organs that work together to perform a major body function
- skeletal system
- The body's framework of 206 bones that support, protect, and enable movement
- muscular system
- All muscles in the body; enables movement and maintains posture
- digestive system
- Breaks food into nutrients; includes mouth, stomach, and intestines
- circulatory system
- Heart, blood, arteries, and veins that transport materials through the body
- respiratory system
- Lungs and airways that bring oxygen in and remove carbon dioxide
- nervous system
- Brain, spinal cord, and nerves that control and coordinate all body functions
- heart
- The muscular pump of the circulatory system; beats about 100,000 times per day
- lungs
- Organs where oxygen enters the blood and carbon dioxide leaves
- brain
- The control center of the nervous system; processes all information and signals
- bone
- Hard connective tissue that forms the skeleton; stores minerals and makes blood cells
- muscle
- Tissue that contracts to create movement; works in pairs
- small intestine
- The long, coiled tube where most digestion and nutrient absorption occurs
- blood
- Liquid tissue in the circulatory system; carries oxygen, nutrients, and waste
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