Lab 8: Pelvic Region

Question 1

what envelops the rectus abdominis muscle?

Answer 1

the rectus sheath

Question 2

what forms the external lamina?

Answer 2

the fused aponeuroses of the external and internal abdominal oblique muscles

Question 3

what is the rectus sheath made up of?

Answer 3

the external lamina and the internal lamina

Question 4

what forms the internal lamina?

Answer 4

the aponeurosis of the transversus abdominis muscle and a layer of fascia

Question 5

what fibrous structure is located at the midline?

Answer 5

the linea alba

Question 6

what can be palpated in the live animal that is loated between the skin and the external oblique dorsal to the stifle?

Answer 6

the subiliac (pre-femoral) lymph nodes

Question 7

what is the pubovesical pouch?

Answer 7

the space between the pubic bone and the bladder

Question 8

what is the vesicogenital pouch?

Answer 8

the space between the uterus (or ductus deferens) and the bladder

Question 9

what is the rectogenital pouch?

Answer 9

the space between the rectum and the uterus (or prostate)

Question 10

what is the broad ligament made up of?

Answer 10

the combined mesenteries of the uterus (mesometrium), ovaries (mesovarium) and uterine tubes (mesosalpinx)

Question 11

describe the anatomical location of the ovaries in the horse

Answer 11

it is suspended from the sublumbar wall by the mesovarium

Question 12

what does the proper ligament of the ovary connect?

Answer 12

the ovary to the uterine horn

Question 13

what does the mesosalpinx connect? what does it form?

Answer 13

it suspends the coiled uterine tube

and forms the mesovarium and a pocket called the ovarian bursa (opens ventrally)

Question 14

what is a peculiarity of the horse ovary?

Answer 14

the ovulation fossa - an area of ovulation on the concave surface

Question 15

what are the parts of the uterus?

Answer 15

a long body
two horns
and a cervix

Question 16

what vasculature runs in the mesovarium?

Answer 16

the ovarian artery

Question 17

where does the ovarian artery originate from?

Answer 17

the aorta

Question 18

what vasculature supplies the uterus?

Answer 18

the uterine artery

and more caudally, the vaginal artery coming from the internal pudendal artery

Question 19

where does the uterine artery arise from? what is the significance of this?

Answer 19

the external iliac artery - this is unique to the horse

Question 20

where does the vaginal artery arise from?

Answer 20

the internal pudendal artery

Question 21

what is the thickened portion of the external abdominal oblique aponeurosis called?

Answer 21

the inguinal ligmaent

Question 22

where does the inguinal ligament end?

Answer 22

amongst the fibers of the strong prepubic tendon

Question 23

what does the external iliac artery give rise to?

Answer 23

the femoral and deep femoral arteries

Question 24

where does the pudendoepigastric trunk arise from?

what does it pass over?

Answer 24

the deep femoral artery

it passes over the inguinal ligament

Question 25

what does the external pudendal artery dive between?

Answer 25

the caudal edge of the internal abdominal oblique and the inguinal ligament

Question 26

what is the opening between the caudal edge of the internal abdominal oblique and the inguinal ligament called?

Answer 26

the deep inguinal ring

Question 27

what does the deep inguinal ring lead to?

Answer 27

the inguinal canal

Question 28

what nerve enters the inguinal canal through the deep inguinal ring?

Answer 28

the genitofemoral nerve

Question 29

in the mare, what nerve and vessel pass through the inguinal canal?

Answer 29

the genitofemoral nerve and external pudendal artery.

Question 30

hat forms the superficial inguinal ring?

Answer 30

a slit in the aponeurosis of the external abdominal oblique