The heart is the pump that circulates blood throughout the body. The body itself does not actively push the blood along by any means, though there are one-way valves in the veins where the pressure is lower. Ultimately the deoxygenated blood reaches the heart due to the pressure of the blood behind it, constantly being pumped forward by the heart.
Erythrocytes also known as red blood cells contain haemoglobin that transports oxygen by combing with it to form oxyhaemoglbin.
The cardiovascular system, specifically the red blood cells, is what transports oxygen to the muscles.
Blood transports oxygen nutrients and wastes in mammals and fish .
The lungs take oxygen into the body and the blood transports oxygen throughout the body.
Hemoglobin transports gasses around the body. Hemoglobin contains iron and other minerals. It forms HbO8 and HbCO2 when bond with gasses.
The circulatory system, specifically blood, contains large amounts of fluid and transports nutrients, wastes, and gases throughout the body. It is responsible for delivering oxygen to tissues, removing carbon dioxide, distributing hormones, and regulating body temperature.
Blood transports oxygen throughout the body. It transports through veins towards the lungs and then to the heart. The heart then pumps this oxygenated blood through the aorta and transports it throughout the body through arteries and capillaries.
Ambulances carry two oxygen tanks to ensure a constant and sufficient supply of oxygen for patients during transport or emergencies. Having two tanks allows for redundancy in case one tank malfunctions or runs out of oxygen before reaching the destination.
red blood cells
The cardiovascular system transports oxygen and nutrients to cells for energy production and maintenance. It also carries waste products such as carbon dioxide and cellular byproducts away from cells for excretion and recycling.
By the currents themselves - water contains oxygen (hence H2O), and nutrients, thanks to decaying (biotic) matter which, yes, contains nutrients even when no longer living.
transports oxygen <3