Transport

• The respiratory system is responsible for the exchange of gases between the body and its environment.
• The circulatory system consists of the heart, blood vessels (arteries, capillaries, and veins), and blood.
• Oxygenated blood travels to the heart through pulmonary veins, while deoxygenated blood returns from the lungs via pulmonary arteries.
• Gas exchange occurs at the alveoli, which are tiny air sacs where oxygen diffuses into the bloodstream and carbon dioxide diffuses out.
• The urinary system removes waste products from the bloodstream and regulates fluid balance in the body.
• The digestive system breaks down food into nutrients that can be absorbed by cells.
• Blood carries oxygen, nutrients, hormones, waste products, and immune cells throughout the body.
• The digestive system breaks down food into smaller molecules that can be absorbed by the body.
• Blood carries nutrients, hormones, waste products, and other substances throughout the body.
• Blood flows into the right atrium of the heart, then passes through the tricuspid valve into the right ventricle.
• Deoxygenated blood leaves the heart through the pulmonary semilunar valves and enters the pulmonary trunk.
• Arteries carry oxygen-rich blood away from the heart, while veins return deoxygenated blood back to the heart.
• Digestion involves mechanical breakdown through chewing and mixing with saliva, chemical breakdown through enzymes produced by various organs, and absorption of digested substances into the bloodstream.
• Ureters transport urine from the kidneys to the bladder.
• Capillaries connect arteries and veins and allow for gas exchange with tissues.
• Kidneys filter blood to remove excess water, electrolytes, and waste products such as urea.
• Pulmonary trunk divides into two branches called pulmonary arteries that carry blood to the lungs.
• The nervous system controls all bodily functions and receives sensory input from the external environment.
• The endocrine system produces hormones that regulate various physiological processes throughout the body.
• Bladder stores urine until it's eliminated during urination.