Pig Disection Flashcards
Fun Facts about mammals
originated 220 million years ago
many different species
what are the three main groups of mammals
Monotremes (egg-laying)
Marsupials (with a pouch)
Eutherian (normal)
urogenital opening
opening that determines sex of pig
- if near umbilical cord- MALE
- if near anus- FEMALE
same as urethra (?)
True of False: The urogenital papilla is present in both male and female pigs
FALSE- just females, will be near urogenital opening
True or False: both male and female pigs have rows of nipples and umbilical cord
TRUE!
When in the womb, what is the umbilical cord for?
It connects the fetus to the palenta
What does the cross section of an umbilical cord look like?
It contains one vein (umbilical vein), and two arteries
anterior, posterior, dorsal, and ventral definitions
anterior- front
posterior- back
dorsal- on back
ventral- on stomach
Define, medial, lateral, proximal, distal
medial- middle
lateral- sides
proximal- close
distal- far
What do the hard and soft palates look like (and where are they)
The hard palette is in the front of the roof of the mouth, the soft palette is further back and both are bumpy
Esophagus vs. trachea
the esophagus was where food goes down and the trachea is where air goes down.
- The pharynx is the junction of both
pharynx vs. epiglottis
The pharynx is a cavity in the back of the mouth and the epiglottis is a cone shaped structure that covers it up.
Taste buds
Found on the sides and back of the mouth- called the SENSORY PAPILLAE
How many days are pigs in the womb and how long are they when they are born?
they are in the womb for 112-115 days and they are 30 cm long
How many toes do pigs have
4
how much are the fetus pig’s eye developed
They eye is almost fully developed with no pupil
Explain the location and purpose of the masseter muscle, lymph nodes, and salivary glands
ALSO: what is the scientific name for salivary glands?
masseter muscle- move jaw, near teeth
lymph nodes- between masseter muscle and salivary glands (partoids), they filter substances
salivary glands- along skin of cheek- look like chewing gum- produce saliva
salivary glands- partoids
diaphragm
muscle dividing thoracic & abdominal cavities
- HELPS WITH BREATHING
Liver
large muscle just under diaphragm
-PRODUCES BILE FOR DIGESTION
Gall Bladder
Small green circular organ located underneath the liver
- STORES BILE
Bile duct
transports bile to duodenum to help break down food
Esophagus
tube just over stomach
-TRANSPORTS FOOD INTO STOMACH
Stomach
pouch just under the liver
- CHURNS/BREAKS DOWN FOOD
what two valves lead into and out of the stomach
cardiac sphincter valve- leads from esophagus to stomach
pyloric sphincter valve- leads from stomach to doudenum
Duodenum
The first part of the small intestine, straight portion coming out of stomach
- USES BILE TO BREAK DOWN FOOD
Ileum
Second, curly part of the small intestine that breaks down large organic molecules to small organic molecules using mesentric arteries
What is messentery
It holds the ileum together
What is the Pancreas
It is a bumpy organ found just under the stomach
- IT CREATES INSULIN WHICH REGULATES BLOOD SUGAR LEVELS
Pancreatic duct
duct leading from the pancreas to the duodenum
Spleen
Flat organ on top of stomach
- STORES BLOOD
Cecum
‘dead end’ branch off of large intestine near the end of the ileum
- BREAKS DOWN PLANT MATERIAL
Rectum
moves from the large intestine to the anus
- STORES UNDIGESTED FOOD AS FECES
Large intestine
-what does it do to undigested food?
Made of rectum and cecum, located after the small intestine
- SUCKS WATER OUT OF UNDIGESTED FOOD
kidneys
bean shaped- lie on either side of the spine
- REMOVE HARMFUL SUBSTANCES FROM BLOOD
Umbilical vessels
Along either side of urinary bladder or umbilical vein
- Same as umbilical artery?
Describe how food moves from your mouth to the duodenum
food goes through the pharynx, through the esophagus, through the cardiac sphincter valve into the stomach. The food is churned up then moves out of the pyloric sphincter valve to the duodenum
How does bile move from the liver to the duodenum
The liver produces bile, it is then stored in the gall bladder and then is transported into the duodenum through the bile duct