Identify error in the given statement:
Two types of blood vessels are present in the body.
Blood vessels:
Final answer: Three types of blood vessels are present in the body.
(a) How many types of blood vessels are there in the human body ? Name them. (b) Why does the heart need valves ?
Given below is a diagrammatic representation of certain types of the blood vessel in the human body.
(a) Identfy the type of blood vessels numbered 1 to 5. (b) Where can such an arrangement be found as an example - in lungs or in heart walls?
Identify errors in the given statements.