Transportation ...

Which of the following statements are true-

1. Pulmonary artery carries blood from the heart, so it is called an artery and not a vein.
2. It carries carbon dioxide-rich blood to the lungs.
   
3. Pulmonary vein carries oxygen-rich blood from the lungs to the heart.

1. The heart is an organ that beats continuously to act as a pump for the transport of blood, which carries other substances with it.
2. The heart is located in the chest cavity with its lower tip slightly tilted towards the left.
3. The two upper chambers are called the atria.
4. the two lower chambers are called the ventricles.

Veins allow blood to flow only_________.

On which side of the chest is the heart of a man present?

Which among the following are signs of heart attack?

Why is the blood from the heart should be transported to the lungs?

Which among the following is/are function of blood vessels?

What are the places in human body where the pulse can be felt?

The capillaries join up to form _____ which empty into the _____.

Which of the following activities benefit in maintaining a healthy heart?