In human physiology, blood is associated with which organ system?

Circulatory System Role
The circulatory system is responsible for transporting blood throughout the body. It consists of the heart, blood vessels (arteries, veins, capillaries), and blood itself.
Functions of Blood in this System
Transport: Carries oxygen from the lungs to tissues and carbon dioxide back to the lungs.
Nutrients: Delivers glucose, amino acids, and other nutrients to cells.
Waste Removal: Transports metabolic waste products to kidneys and liver for excretion.
Defense: Contains white blood cells and antibodies that fight infections.
Regulation: Helps maintain body temperature, pH balance, and fluid balance.
Integration with Other Systems
While blood is primarily part of the circulatory system, it also interacts closely with:
Respiratory system (gas exchange in lungs).
Digestive system (absorbing nutrients into the bloodstream).
Excretory system (removing wastes via kidneys).
Immune system (defense against pathogens).
In short: Blood belongs to the circulatory system, but it is a vital connector across multiple organ systems to keep the body functioning smoothly.