The upper dilated end of the nasolacrimal duct that is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla; it connects the lacrimal canaliculi, which drain tears from the eye's surface, and the nasolacrimal duct, which conveys this fluid into the nasal cavity; like the nasolacrimal duct, the sac is lined by stratified columnar epithelium with mucus-secreting goblet cells, and is surrounded by connective tissue. — UBERON
Machine-generated and unreviewed. Its grounding comes
from the seeder's rules, not from a curator.
Source attestations
Each upstream vocabulary's own account of this habitat. Assertion
counts are per-source units and are not comparable across sources —
GOLD counts organisms, BacDive strains, PREGO taxa.
What each upstream vocabulary says about this habitat
Source
Label / path
Assertions
Unit
GOLD
Host-associated > Mammals: Human > Integumentary system > Lacrimal apparatus > Lacrimal sac