Question

Give reason -
a) Muscular floor of chest cavity
b) Tiny pores on the surface of leaf.

Answer 1

(A)MUSCULAR FLOOR OF CHEST CAVITY:

• The diaphragm is a C-shaped structure that separates the thoracic cavity from the abdomen.
  
• The dome curves upward.
• The superior surface of the dome forms the floor of the thoracic cavity, and the inferior surface the roof of the abdominal cavity.

(B)TINY PORES ON THE SURFACE OF THE LEAF:

• A stoma, also called stomata is a pore found in the epidermis of leaves, stems, and other that facilitate gas exchange.