Scavanger cells of alveoli celled :-

Type II cells of alveoli secrete

A functional mammary gland is characteristic of all female mammals. The glandular tissue of each breast is divided into __________A__________ containing clusters of cells called alveoli. The cells of alveoli secrete milk, which is stored in the cavities (lumens) of alveoli. The alveoli open into __________B__________. The __________B__________ of each lobe join to form a __________C__________. Several __________C__________ join to form a wider __________D__________ which is connected to __________E__________ through which milk is sucked out.

Scavanger cell of connective tissue proper is called as-

Mucus cells (Goblet cells) :-

Androgenic haploidy makes use of cells (a) Anther cells (b) Callus cells (c) Megaspore cells (d) Microspore cells

Plant cell and Animal cell

What causes O_(2) to enter pulmonary capillaries from alveoli and to enter tissue cells from systemic capillaries?

Do cells of alveoli or lungs also require oxygen to carry out cellular respiration ? Why / Why not ?