biogenic substance
substance produced by life processes; it may be either constituents, or secretions, of plants or animals
nasal mucus
viscous colloidal mucus in a nose
blood plasma
liquid component of blood
blood serum
cell free fraction of blood
exuviae
remains of an exoskeleton left after an ecdysozoan has moulted
aqueous humour
transparent, watery, fluid similar to plasma, but containing low protein concentrations, secreted from the ciliary epithelium
body fluid
liquid originating from the inside of an organism, including fluids excreted or secreted, and body water that normally is not
dead wood
collective term for dead trees or their parts
tooth enamel
outer tooth tissue
tissue
cellular organizational level intermediate between cells and a complete organism; cells that are grouped together with a common function
toe jam
sticky matter accumulated between digits of a foot
blood
organic fluid which transports nutrients throughout the organism
vitreous humour
clear gel that fills the space between the lens and the retina of the eyeball
horn substance
material similar to keratin
olfactory bulb
neural structure of the vertebrate forebrain involved in olfaction, which sends olfactory information to be further processed in the amygdala, the orbitofrontal cortex and the hippocampus where it plays a role in emotion, memory and learning
biogenic sediment
sediment of animal or vegetable origin
secretion
any substance that is secreted by an organism
buffy coat
component of blood