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CPA Fetal Pig Dissection

Scrotal Sacs
Functions to keep sperm cooler during spermatogenesis
Cremasteric Pouch
Contains the testis and epididymis
produce sperm cells
store sperm cells
Vas deferens
conduit for maturing sperm and brings them to the urethra
male sex organ
produce eggs/ova
Houses the fetuses
muscular tube that connects the uterus to the urogenital sinus
urogenital sinus
the vagina and urethra open into a common tube that serves both reproductive and urinary functions in female pigs. this is different from human females where the vagina and urethra exit the body via separate openings
thymus gland
located on anterior surface of heart, slightly left of midline. extends forward into both side of neck. size varies b/n human and pigs due to age not species. all fetuses have enormous thymus, gradually shrinks through life. like spleen, thymus contains immune cells, function to protect body
thin serous membrane beneath the thymus covering the heart
pumps blood to body through aorta. pumps blood to lungs via pulmonary arteries
muscular tube visible at anterior end of heart
cut through ________ to see heart
lobed spongy structures located on ether side of the heart. Functions in respirating by enabling gas exchange between the atmosphere and body
bronchial tubes
Y-shaped tubes that connect the two lungs to the trachea and to each other
relatively easy to identify in neck and thoracic cavity due to presence of cartilage rings-give segmented appearance.
cartilage rings
keep thyroid from collapsing as it carries air
thyroid gland
small brown-purple gland located in the neck region between the lobes of the thymus and superficial to trachea. important in regulating metabolism
located at the anterior end of the trachea, also know as the "voice box"
functions in swallowing. behind trachea.
thin muscular sheet that divides the thoracic and abdominal cavities. aids in respiration or breathing
large brown lobed structure located at anterior end of abdominal cavity. metabolizes many drugs (alcohol) and makes a substance similar to detergent for fat digestion called bile.
gall bladder
small sac-like structure located underneath the right part of the liver. it collects bile, which is sent to the initial portion of the small intestine (duodenum) via the cystic and common bile ducts
a pouch shaped organ that rests just underneath the liver in the upper left quadrant. it is responsible for storing food and prepares it for digestion
thin flat organ in pig that lies along left margin of stomach toward extreme left side. looks like flat worm or leech. spleen is involved with maturation processing of immune cells that protect the body
duodenum (small intestine)
the initial segment of the small intestine, which is located immediately after the stomach (straight part). it is a major location for food digestion
located at top of stomach near diaphragm. functions in swallowing.
bumpy yellowish brown gland located along bottom of stomach--extending to duodenum. looks like "creamed corn" makes digestive enzymes, carried by pancreatic duct to duodenum. also makes hormone insulin which promotes sugar uptake from blood
Ileum (small intestine)
longest and most distal region of three parts of small intestine (curly part). further digestion occurs and nutrients are absorbed here
a blind sac or "dead end" branch off of the large intestine. looks like crooked finger. found just below the juncture of the distal end of the ileum and proximal end of large intestine
large intestine
tightly wound coil of the large intestines. reabsorbs water from digested food
lies towards lower back region of the pig is firmly attached to the dorsal wall of the cavity. indigestible materials are processed here by coli form bacteria and the remaining water is reabsorbed. result is feces. opens to outside via anus
two bean shaped. located on either side of spine. covered by peritoneal membrane and located retroperitoneal. excrete harmful substances from the blood and form urine
urinary bladder
large flattened sac that lies between two umbilical arteries. stores urine.
two thin retroperitoneal tubes that connect the kidneys to the urinary bladder and enables urine flow
large tube that exits off bottom of urinary bladder. bladder must be pulled up and urethra can be separated from surrounding tissue. urethra enables urine to flow from urinary bladder to urogenital opening