Which type of blood vessel is best suited for rapid exchange of gases and nutrients with body tissues?
Capillaries
Capillaries are the finest blood vessels, with walls only one cell thick.
Their thin walls and large total surface area allow quick exchange of oxygen, carbon dioxide, nutrients and wastes between blood and tissues.
Arteries and veins have thick walls and mainly carry blood.
Hence, the answer is capillaries.
Which part of the human brain controls thinking and learning abilities of a person?
Which part of the human eye controls the amount of light entering the eye?
Why is the small intestine able to fit into a compact space within the human body?
Why does the sight of or thought of delicious food make our mouths "water"?
Which acid does our stomach produce and what is its pH?
Which defect occurs when the eye lens loses its ability to focus on near objects due to decreased flexibility?
In human beings, the respiratory pigment that carries oxygen is ______.
Which gas is essential for aerobic respiration in animals?
Match 'Column A' with 'Column B' in context of the muscular layers in blood vessels.
| Column A | Column B |
| (a) Thick tunica media | (i) Vein |
| (b) Smallest vessel diameter | (ii) Artery |
| (c) Large lumen | (iii) Capillary |
| (d) Endothelium | (iv) All blood vessels |
A researcher needs to deliver a drug directly to the cells of an organ for rapid effect. Which blood vessel should the delivery target for optimal diffusion to surrounding cells?
A resting person, usually has a pulse rate between ______ and ______ beats per minute
In humans, neck and head are joined by which joint ?
The human skeleton is composed of around ______ bones at birth.
At which period of life, body undergoes changes leading to reproductive maturity?
Milk is no longer called a balanced diet due to the lack of which one of the following?