Animals need food and oxygen to be alive. They use oxygen from the air they breathe, absorb nutrients from the food they eat and give out harmful products like nitrogenous wastes and Carbon dioxide.
This intake of food and oxygen and the removal of wastes is done by the transport system comprising of blood, blood vessels and heart.
The to and fro movement of the blood from the heart to all parts of the body and back to the heart is called blood circulatory system.
The circulatory system in animals consists of blood, blood vessels and heart. The blood flows through the blood vessels. This flow of blood is regulated by heart.
A SmartTest on Transport of Nutrients in Living Things
Learnhive lesson on Transport of food and minerals in animals/humans.
Learnhive Lesson on Transport of Nutrients in Living Things