Bowman's capsule
A cup-shaped receptacle in the vertebrate kidney that is the initial, expanded segment of
the nephron where filtrate enters from the blood.
Box
A small portion of a gene or protein that appears in many genes or proteins that are related
in structure; the box usually has some specific function, sometimes called a "motif", like
binding DNA or interacting with specific proteins or other molecules.
Brain
The master control center in an animal; in vertebrates, the brain and spinal cord make up
the central nervous system.
Brainstem
The hindbrain and midbrain of the vertebrate central nervous system. In humans, it forms a
cap on the anterior end of the spinal cord, extending to about the middle of the brain.
Bracteates
Having bracts.
Bryophyte
The mosses, liverworts, and hornworts; a group of nonvascular plants that inhabit the land
but lack many of the terrestrial adaptations of vascular plants.
Bronchus
One of a pair of respiratory tubes branching into either lung at the lower end of the trachea;
it subdivides into progressively finer passageways, the bronchioles, culminating in the
alveoli.
Bucco-pharyngeal
Pertaining to the cheek and the pharynx or to the mouth and the pharynx. (In amphibians
respiration takes place by mouth cavity also )
Bud
(1) In plants, an embryonic shoot, including rudimentary leaves, often protected by special
bud scales.
(2) In animals, an asexually produced outgrowth that develops into a new individual.
Budding
An asexual means of propagation in which outgrowths from the parent form and pinch off
to live independently or else remain attached to eventually form extensive colonies.
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