afferent: going towards; commonly refers to blood vessels that are entering or going towards something, like the heart.
anthropomorphic: when we puny humans project our emotions or perceptions on an inapplicable situation
avian: of or having to do with birds; birds belong to the class "Aves")
chromosome: nature's way of packaging DNA so that it may be transferred from a parent to a baby; a little x-shaped DNA nugget
concurrent: describes when two things flow in the same direction; often refers to bloodflow
countercurrent: describes when two things flow in opposite directions; often refers to bloodflow
cloaca: the sexy bits of reptiles, amphibians and birds; essentially a reproductive hole found in both female and males
diploid: the condition of having two sets of chromosomes. You are diploid. Congratulations.
efferent: going away from; commonly refers to blood vessels that are leaving something, like the heart.
fitness: animal's survivability; represents the correlation between an animal's physical/behavior advantages and it's chances of survival.
gravidity: the condition of carrying eggs or young. Describes pregnancy (carrying of a fetus) but expands to include the condition of carrying eggs.
haploid: the condition of having one set of chromosomes; doesn't occur very often in nature, except in non-sexual reproduction, i.e. budding, cloning, etc.
invertebrate: A critter that does not possess a backbone; often represent ancient lineages that emerged first in evolutionary history; includes insects, bugs, starfish, worms, octopus, just to name a few.
morphology: the construction of an animal; i.e. Your morphology, human, lends itself to walking upright and performing dexterous tasks with your hands.
mutation: A change; commonly refers to a natural change in DNA sequence that results in a change like albinism, or Wolverine from X-Men.
niche: a position within an ecosystem; i.e. My niche within my family is the light-hearted younger sister who keeps everyone young at heart.
passerine: A songbird that belongs to the family Passeridae; Mockingbirds, Warblers, Titmice, Crows, etc.
photoperiod: length of day vs. night; many animals' seasonal activities like mating, hibernation, and migration depend on the changing photoperiod throughout the year.
phyla: a broad term that refers to the array of organisms in the world
physiology: the study of how the systems within an animal's body function.
scary ass: sophisticated descriptor of something I personally find terrifying or disturbing
setae: little hairs; when located on a mandible, may also be referred to as "hairs on a chinny-chin-chin."
species: debatable. Loosely, a group of very similar animals that can successfully breed with one another.
substrate: something that something else attaches to. i.e. A snail crawls along a blade of grass- the blade of grass is the substrate. Also, refers to the molecule that an enzyme attaches to and changes.
taxonomy: the classification and naming of similar animals into groups.
terrestrial: refers to a land-dwelling organism
vertebrate: critter with a backbone.