Which of the following system helps us to breathe air?
Skeletal system
Muscular system
Respiratory system
Digestive system
Humans produce babies with the help of:
Nervous system
Reproductive system
Excretory system
Organs that are inside the human body are known as:
Internal organs
External organs
Mechanical organs
Electrical organs
Which of the following system helps to break the food we eat?
The sense organs are connected to the brain through:
Senses
Nerves
Spinal cord
Blood vessels
Which of the following are red colored liquid that transports gases and nutrients throughout the body?
Blood
Saliva
Gastric juices
The useful parts of food is taken by the blood in the:
Mouth
Stomach
Food pipe
Small intestine
The heart, the blood and the blood vessels make up the:
Circulatory system
We breathe out:
Carbon dioxide
Oxygen
Nitrogen
Hydrogen
Which of the following is an external organ?
Lung
Heart
Arm
Kidney
