Biology - Interactions of Systems

digestive + respiratory

not physically connected

• Respiratory system allows digestive system to obtain oxygen in order to function.

• Digestive system allows cells within the respiratory system to obtain glucose and other nutrients in order to function

respiratory + circulatory

• Capillaries connect with respiratory system at the alveoli

• Gas exchange: oxygen move into blood from the lungs, carbon dioxide move from blood into the lungs

circulatory + digestive

• Capillaries connect with the small and large intestine

• blood deliver oxygen to the cells of digestive system to allow them to function

• Capillaries close to the surface allow nutrients to be absorbed from digestive system and be transported to the body

circulatory + muculoskeletal

• muscles require lots of oxygen and nutrients in order to contract, capillaries deliver that oxygen

• capillaries remove high amounts of carbon dioxide that muscles produce

• skeletal muscles push blood in veins against gravity

nervous + musculoskeletal

• nervous system connects to muscles telling them to contract or relax

• contraction/relaxation of muscles allows for movement at the joints of the skeletal system

circulatory + excretory

• kidneys remove waste from blood and excrete it as urine

• capillaries deliver oxygen and nutrients for the kidneys to function

• kidneys can control blood pressure by reabsorbing varying amounts of ions and water