The first indication of the wing buds is of a thickening of the hypodermis, which can be observed in insect species as early the embryo, and in the earliest stages of the life cycle.
22.
Eccrine glands are composed of an intraepidermal spiral duct, the " acrosyringium "; a dermal duct, consisting of a straight and coiled portion; and a secretory tubule, coiled deep in the dermis or hypodermis.
23.
Within the deeper layers of the dermis and hypodermis, is a specialized type of connective tissue areolar connective tissue, which mediates the "'inflammatory response "', or self-healing capacity of the body.
24.
In the earlier stages of its development, the wing-bud is not provided with special organs of respiration such as tracheation, as it resembles in this respect the other portions of the hypodermis of which it is still a part.
25.
"' Bacillary band "'is a specialized row of longitudinal cells of some nematodes ( " Trichuris " and " Capillaria " ), consisting of glandular and nonglandular cells, formed by the hypodermis.
26.
The human skin ( integument ) is composed of a minimum of two major layers of tissue : the epidermis and dermis . ( The hypodermis or subcutaneous layer is not part of the skin . ) The epidermis forms the outermost layer, providing the initial barrier to the external environment.
27.
The leaves are triangular in cross section, the hypodermis usually with a double layer of cells; resin ducts ( 1-) 2-3 ( 4 ), medial, occasionally 1 internal, stele oval in cross section; outer walls of endodermal cells not thickened; vascular bundles 2, distinct, the xylem strands often connate.
