Question

Fill in the blanks: (iv) The substances to and from the tissues diffuse through the walls of

Answer 1

Solution:
Capillaries.

• The thin walls of capillaries allow the movement of gases like oxygen and carbon dioxide and also of substances like amino acids, hormones, etc.
• The oxygen moves from the capillaries through diffusion into the tissues.
• The carbon dioxide moves from the tissues into the capillaries.