Flashcards in Lab 24: Avian Anatomy Deck (22):
fx of uropygial gland papilla
has sebaceous secretion that is spread to feathers during preening
T or F: birds don't have sweat glands
triceps brachii is supplied by which nerve?
sciatic n. lies deep to which muscle?
T or F: birds don't have a diaphragm
what is a crop?
right-sided outpocketing of the esophagus near the thoracic inlet
Which is larger: the L or R jugular vein in the bird?
R jugular vein
Which 2 veins are commonly used for venipuncture in birds?
brachial vein, cutaneous ulnar (wing) vein
T or F: bird kidneys are multi-lobed
T or F: birds don't have a urinary bladder or urethra
How does the venous circulation in the hindquarters differ in birds vs. mammals?
Birds use a "renal portal system" which sends blood percolating through the kidney before returning to the heart through the vena cava
3 parts of the cloaca
coprodeum, urodeum, proctodeum
Why are the spermatic cord and tunica vaginalis absent in birds?
The testes do not descend; they remain at their abdominal origin. There are also no accessory glands or urethra
What is caponization?
removal of testes a bird. Facilitates fattening and improves meat quality
copulatory organ located in the ventral tip of the vent. Form a groove for the passage of sperm when engorged with lymph
describe the oviduct of the bird
-represents the entire genital tract from the ovary to the cloaca
-reduced in length during moulting
-usually only develops on the left side
-has 5 sections
5 sections of the oviduct of a bird
shortest segment of the oviduct of a bird
infundibulum. It is fluted and thin-walled and the oocyte passes through it in about 15 mins.
longest segment of the oviduct of a bird? What does it produce?
magnum. It is highly coiled and its mucosa secretes about half of the total albumin to the egg over a period of 3 hrs
What does the isthmus secrete?
albumin and shell membranes
What does the uterus secrete?
hard calcareous shell of the egg