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120 Cards in this Set

  • Front
  • Back


The skin of poultry is composed of

Stratified squamous epithelium


Underlying vascular dermis

Area where the skin thickens and becomes more vascular, provides incubation for eggs

Brooding patches

Hallmark of class aves

Presence of feathers

An extension of dermal tissue into the shaft of the feather and is prominent only during growth

Feather pulp

A large growing feather that can cause hemorrhage

Blood feather

Comprises of flight feathers, has interlocking nature

Contour feather

Fluffy feathers, no interlocking

Down feathers

Semi rigid shaft and multiple barbs form the

Vane

Feathers are not uniformly distributed in the body, instead occuring in

Feather tracts

Areas relatively free from contour feathers, notable under wings

Apteria (apterium)

When do chickens molt

After 12 months

Restriction of food and water results to

Forced molt

Bilobed gland that opens to a raised papilla between tail feathers

Uropygial gland

Oily secretion is spread how?

Preening behavior

Used as a weapon for male chickens and turkeys

Spur

Located on the dorsal midline

Comb

Hangs from the ventral face

Paired wattles

Decorate the sides of the head

Ear lobes

Irregular bumps on the heads of turkeys

Caruncles

Finger like flesh that hangs from the dorsal aspect of the face down across the beak

Snood

Yellowish color of skin is due to

Carotenoid pigment, xantophyll

Vertebral formula of fowls

C14-17, T5-7, L/S14, Cy5-6

Vertebrae in thoracic region

Notarium

Vertebrae in lumbosacral region

Synsacrum

Last few caudal vertebrae

Pygostyle

Provides a solid mass of stability of the tail feathers

Pygostyle

Shoulder girdle comprises the

Scapula


Coracoid


Clavicle

Bridge between the shoulder joint and sternum

Coracoid

Acts as a bony strut to maintain distance between 2 shoulders

Furcula

Long bones of the metacarpal region

Carpometacarpal bones

Thumb, possess 2 phalanges

Pollux

Dramatically modified for flight, primary site of attachment of pec. muscles

Sternum

Shield like mass of the sternum

Keel or sternal crest

Produce the downbeat of the wings that is essential to provide lift during flight

M. Pectorals

Featherless and covered by thick keratinous epidermis

Beak

How does the mouth of birds differ from mammals

The palate is incompletely fused

Longitudinal opening between oral and nasal cavities

Choanal cleft

Characterized by a raised pharyngeal mound

Pharyngeal floor

Laryngeal mound features the

Aditus laryngeus

Distensible dilation in the esophagus

Crop or ingluvies

Type of stomach in birds

Bipartite

First chamber, provides pepsin and HCL

proventriculus / glandular stomach

Second chamber, largely fills the lower left of the body cavity

Gizzard / muscular stomach

Highly keratinized mucosa on the inside of the gizzard, forms a thick leathery sheet, removed during processing

Cuticle

Forms a distinctive loop with the pancreas

Duodenum

Longest segment of the small intestine, retains remnant of the embryonic connection to the yolk sac

Jejunum

Assumes an immune function after retraction of yolk sac before hatching

Meckel's diverticulum

Terminates at the large intestine

Ileum

Diverticula of colon in duck chickens and turkeys

10-25 cm

Diverticula of colon is

22-34 cm

Provide a site of digestion of fiber

Paired ceca

Wild birds that eat seeds

Granivores

Short and straight, terminating at the sphincter interposed between large instestin and cloaca

Colon

Expanded region that is common to the GI and urogenital tracts

Cloaca

Cloaca is divided by

Ring folds

Dilated region that temporarily holds feces

Coprodeum

Feautures openings of 2 ureters in dorsal aspect of lumen

Urodeum

Last portion of the cloaca

Proctodeum

Opens into the dorsal aspect of the proctodeum

Bursa of Fabricius (cloacal bursa)

Lined by lymphoreticular tissue and is largest in juvenile animal gradually becoming smaller as the bird ages

Bursa

In anseriformes, the proctodeum also houses the

Male copulatory organ

Oral end of the trachea is guarded by

Larynx

Larynx has 2 cartilage

Cricoid


Arytenoid

Prominence caudal to the tongue

Laryngeal mound

Protector of the airway

Larynx

Organ of phonation in birds

Syrinx

Blind ended expansions of the respiratory tree

Air sacs

Modified bones

Pneumatic bones

Epithelium of the air sacs

Simple squamous epitheliun

Resting heart rate

200-350 beats per minute

Normal body temp

41-43 C

Avian kidneys lie on the ventral surface of the

Synsacrum

Kidney is divided into

Cranial, middle, caudal lobes

Unique system that birds have

Renal portal system

Receives venous blood from the caudal body and distributes it to the second capillary system

Cranial and caudal renal portal veins

Similar to reptiles, do not include segment, contained in the outer zones of the lobules

Reptillian-type nephron

Nephron that does not have segments, loops extend downward

Mammalian-type nephrons

Birds excrete

Uric acid

Female repro id divided into

Ovary and oviduct

Cluster of developing yolks or ova located midway between the neck and tail of bird

Ovary

How many ova can grow

13k to 14k

Ovum is surrounded by

Vitelline membrane

Release of mature ovum

Ovulation

Second part of the femal repro, long convoluted tubule 25-27 inches long divided into 5 sections

Oviduct

Ovum ruptures along the

Suture line or stigma

Release of ova occurs

30-75 minutes

First part of the oviduct, 3 to 4 in long, enguls ovum

Infundibulum

Ovum remains in the infundibulum for

15-18 mins

Serves as a reservoir for spermatozoa

Infundibulum

13 inches long, largest section of oviduct, ovum remains here for 3 hours which albumen is added

Magnum

4 inches long, egg remains here for 75 mins, narrow band of tissue connecring two parts of anatomical structure, where inner and outer shell membrane is added

Isthmus

4-5 inches long, egg stays here foe 20 plus hours, shell is placed here as well as pigment deposition

Shell gland or uterus

Shell is made up of

Calcium carbonate

4-5 inches long does not play a part in egg formation, help push egg out of the hen

Vagina

Laying of the fully formed egg

Oviposition

Added to the egg in vagina prior to oviposition

Bloom or cuticle

Can store sperm for long periods of time 10 days to 2 weekz

Sperm host glands

Total time of egg formation

25-26 hours

Phenomenon the occurs due to age of hen or genetics

Double-yolked eggs

When shell becomes damaged but is repaired

Body check

Elliptical shaped and light yellow in color

Testes

Serve as the copulatory organ

Papillae

Rudimentary copulatory organ

Located in the medial ventral portion of cloaca and used to classify sex

Surgical castration of mae chickens

Caponization

Male chickens are typically caponized at

2-4 weeks

Responsible for voluntary actions

CNS

Responsible for involuntary action

Autonomic nervous system

Most common method employed to slaughter poultry

Water bath stunner, electrical stunning

Alternative method for alaughter

Controlled atmosphere killing

Includes inherent ways in which poultry resists disease

Non specific immune mechanism

Non specific mechanisms include

Genetic factors


Body temperature


Anatomic features


Normal microflora


Respiratory tract cilia

Some strains of chickens are genetically resistant to

Lymphoid leukosis virus

Ways on how we can disrupt the balance of microflora

Improper use of antibiotics


Poor sanitation

Characterized by specificity, heterogenecity, and memory

Specific immune system

Includes immunoglobulins and cells that produce 5hem

Non cellular component

Cells that produce antibodies

B lymphocytes

B lymphocytes are produced in the

Liver, yolk sac, bone marrow

Found in the eye socket

Harderian gland

Prevents programminf B cells

Gumboro disease


Infectious bursal disease


Marek's disease

Includes all cells that react with specificity to antigens, T lymphocytes

Cellular component