How the Circulatory System Interacts with 7 Other Body Systems
Circulatory System: The Body's Transportation Network
The cardiovascular system (heart + blood vessels) transports blood, enabling exchange with every other system.
Key Interactions
- Respiratory: Pulmonary circulation picks up O₂ in lungs, releases CO₂.
- Digestive: Capillaries in intestinal villi absorb nutrients into bloodstream.
- Excretory: Blood delivers waste to kidneys for filtration into urine.
- Endocrine: Hormones travel via blood to target organs.
- Immune: White blood cells patrol via bloodstream; lymphocytes traffic to infection sites.
- Lymphatic: Lymph returns interstitial fluid and immune cells to venous circulation.
- Musculoskeletal: Blood supplies O₂/nutrients for muscle contraction and bone remodeling.
This integration maintains homeostasis—stable internal conditions essential for life.
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