What are some body systems connected to the circulatory?

* Respiratory system: The circulatory system works with the respiratory system to transport oxygen from the lungs to the rest of the body. Oxygen is picked up by red blood cells in the lungs and carried to the heart. The heart then pumps the oxygenated blood to the rest of the body.

* Digestive system: The circulatory system works with the digestive system to transport nutrients from the food we eat to the rest of the body. Nutrients are absorbed by the small intestine and then carried to the liver by the bloodstream. The liver then processes the nutrients and sends them to the rest of the body.

* Excretory system: The circulatory system works with the excretory system to remove waste products from the body. Waste products are carried by the bloodstream to the kidneys, which filter them out. The filtered waste products are then excreted in urine.

* Endocrine system: The circulatory system works with the endocrine system to transport hormones to different parts of the body. Hormones are chemical messengers that control many different bodily functions, such as growth, reproduction, and metabolism.

* Immune system: The circulatory system works with the immune system to fight infection. White blood cells, which are part of the immune system, travel through the bloodstream and help to destroy bacteria, viruses, and other foreign invaders.