A structure especially in a vein or lymphatic that closes temporarily a passage or orifice or permits movement of fluid in one direction only. — BTO
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 > Circulatory system > Heart > Heart valve