Chapter 19 - Avian Species
This group of terms is from Chapter 19 in your text.
Terms in this set (36)
nine thin, transparent membranes that are connected to the primary and secondary bronchi and act as reservoirs for air entering and leaving the lungs.
chicks that are hatched with their eyes closed and their skins bare and that are immobile.
bone in birds that originates from the wrist and is comparable to a first finger; carries feathers that aid in steering.
toe position in which three toes face forward and one faces the rear.
bare areas of skin of birds where feathers do not originate.
small contour feathers located around the external ear openings in birds.
slender projections off the main feather shaft; make up the vanes on each side of the shaft.
microscopic projections off feather barbs that help maintain a contour feather's structure.
a developing feather that contains blood in its shaft for growth and nourishment.
modified contour feathers with a stiff rachis and few barbs at the base; found around the eyes, mouth, nostrils, and toes of some bird species, these serve a tactile function.
area of thickened skin on the lower abdomen of birds, where feathers are plucked to transfer heat to eggs during incubation.
bursa of fabricius
specialized organ in birds that is necessary for B-lymphocyte development.
general term for pathology of the avian foot; includes cuts, abrasions, blisters, ulcers, punctures, and infections.
fleshy colored skin located at the base of the upper beak in many bird species; supplied with touch corpuscles.
two internal nares that open from the nasal chambers into the roof of the mouth.
the total number of eggs laid for a single nesting period.
middle ear bone in birds.
the process of trimming and shaping a bird's beak.
anterior section of the cloaca that receives excrement from the intestine.
dilation of the esophagus in some species of birds that acts as a storage pouch for food.
top part of the head.
another term for pectoral crest.
species that can lay only the number of eggs in a normal clutch size.
the condition resulting when an egg gets stuck in the oviduct of birds.
specialized projection on the upper bill of the chick that helps it emerge from the shell at hatching.
area on a feather vane that lacks barbules, also called a stress bar; caused by an interruption of the feather's blood supply during development.
the act of rubbing the beak on a rough surface to clean it and maintain its shape.
depression in the skin that gives rise to and stabilizes a new feather.
depression in the retina of the eye containing a high concentration of cone cells; some birds have two of these to help with binocular vision.
muscular stomach in birds that grinds food into a digestible form.
the concave articular surface of the scapula; in birds, the wing is attached to the body by forming a joint in the depression.
rapid vibrations of the upper throat patch in many species of owls, herons, quail, pigeons, and doves; used to increase cooling by evaporative loss of heat from air passed over the oral cavity.
microscopic hooks that link barbules together.
phagocytic avian white blood cell equivalent to the mammalian neutrophil; generally round, containing a bilobed nucleus with clumped chromatin and rod-shaped, red-orange granules in the cytoplasm.
species that can produce more eggs than their normal clutch size.
The funnel-shaped ovarian end of the oviduct.
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