Partitioning the insect head anlage into a fixed number of segmental units. The number of segments composing the insect head has long been a subject of debate, but it is generally agreed that there are 6 or 7 segments. From anterior to posterior the head segments are the procephalic segments (labral, (ocular), antennal and intercalary) and the gnathal segments (mandibular, maxillary and labial).

The negative regulation of cell growth in response to increased cell density.

Any process that stops, prevents or reduces the rate or extent of cell proliferation in response to cell density.

Partitioning the insect head anlage into procephalic (labral, (ocular), antennal and intercalary) segments. The procephalic segments lie anterior to the gnathal (posterior head) segments, and are pattered by different segmentation gene cascades to the abdominal, thoracic and posterior head (gnathal) segments.

The process in which a relatively unspecialized epidermal cell acquires the specialized features of a sebaceous gland cell.

Transport of pre-microRNAs (pre-miRNAs) from the nucleus to the cytoplasm. Pre-miRNAs are a ~60-70 nucleotide stem loop intermediate in miRNA production, produced by the nuclear cleavage of a primary miRNA (pri-mRNA) transcript. Pre-miRNAs are transported from the nucleus to the cytoplasm where further cleavage occurs to produce a mature miRNA product.

The regionalization process that divides an organism or part of an organism into a series of semi-repetitive parts, or segments, often arranged along a longitudinal axis.

The tube morphogenesis process in which the primitive heart tube loops asymmetrically. This looping brings the primitive heart chambers into alignment preceding their future integration. Heart looping begins with dextral-looping and ends when the main regional divisions of the mature heart and primordium of the great arterial trunks become established preceeding septation.

The process in which the anatomical structures of the embryonic heart tube are generated and organized. The embryonic heart tube is an epithelial tube that will give rise to the mature heart.

The process whose specific outcome is the progression of a lymph vessel over time, from its formation to the mature structure.

A bundle of hundreds of cross-linked actin filaments (an actin cable), that is the supporting structure of a stereocilium. Filaments are oriented such that the the plus (barbed) ends are at the tip of the protrusion and are capped by a tip complex which bridges to the plasma membrane.

Division of an appendage, an organ or part that is attached to the main body of an organism, into a series of semi-repetitive parts or segments. Most arthropod appendages, such as the legs and antennae, are visibly segmented.

Lymph vessel formation when new vessels emerge from the proliferation of pre-existing vessels.

A parallel bundle of actin filaments that is part of filopodium. Filaments are oriented such that the plus (barbed) ends are at the tip of the protrusion, capped by a tip complex.

OBSOLETE. Division of a leg into a series of semi-repetitive parts or segments. Most arthropod appendages are visibly segmented; the Drosophila leg for example has nine segments, each separated from the next by a flexible joint.