Lab 24: Avian Anatomy Flashcards Preview

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Flashcards in Lab 24: Avian Anatomy Deck (22)
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0
Q

T or F: birds don’t have sweat glands

A

T

1
Q

fx of uropygial gland papilla

A

has sebaceous secretion that is spread to feathers during preening

2
Q

triceps brachii is supplied by which nerve?

A

radial

3
Q

sciatic n. lies deep to which muscle?

A

biceps femoris

4
Q

T or F: birds don’t have a diaphragm

A

T

5
Q

what is a crop?

A

right-sided outpocketing of the esophagus near the thoracic inlet

6
Q

Which is larger: the L or R jugular vein in the bird?

A

R jugular vein

7
Q

Which 2 veins are commonly used for venipuncture in birds?

A

brachial vein, cutaneous ulnar (wing) vein

8
Q

T or F: bird kidneys are multi-lobed

A

T

9
Q

T or F: birds don’t have a urinary bladder or urethra

A

T

10
Q

How does the venous circulation in the hindquarters differ in birds vs. mammals?

A

Birds use a “renal portal system” which sends blood percolating through the kidney before returning to the heart through the vena cava

11
Q

3 parts of the cloaca

A

coprodeum, urodeum, proctodeum

13
Q

Why are the spermatic cord and tunica vaginalis absent in birds?

A

The testes do not descend; they remain at their abdominal origin. There are also no accessory glands or urethra

14
Q

What is caponization?

A

removal of testes a bird. Facilitates fattening and improves meat quality

15
Q

phallus

A

copulatory organ located in the ventral tip of the vent. Form a groove for the passage of sperm when engorged with lymph

16
Q

describe the oviduct of the bird

A
  • 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
17
Q

5 sections of the oviduct of a bird

A

1) infundibulum
2) magnum
3) isthmus
4) uterus
5) vagina

18
Q

shortest segment of the oviduct of a bird

A

infundibulum. It is fluted and thin-walled and the oocyte passes through it in about 15 mins.

19
Q

longest segment of the oviduct of a bird? What does it produce?

A

magnum. It is highly coiled and its mucosa secretes about half of the total albumin to the egg over a period of 3 hrs

20
Q

What does the isthmus secrete?

A

albumin and shell membranes

21
Q

What does the uterus secrete?

A

hard calcareous shell of the egg

22
Q

Where does the vagina begin and end? Describe the fx of the vagina in a bird during laying.

A

Begins at a uterovaginal sphincter and opens on the lateral wall of the urodeum. During laying, protrudes through the vent to minimize contact with feces.

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