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What are unborn pigs called? |
fetal pigs |
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How is their age (length of gestation) determined? |
length from tip of snout to the base of tail (NOT TIP) |
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How long does full gestation take? |
115 days (means 25-32 months old) |
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Classify the pig: |
K: Animalia P: Chordata C: Mammalia O: Artiodactyla F: Sudiae G: Sus S: Scrota (domesticata) |
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Approx. how many piglets does a sow have in a litter? |
8-12 |
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Is a pig biped or quadruped? Why? |
quadruped, pig walks on all fours |
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Pertains to the head? |
cranial |
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Forward? |
anterior |
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Toward the snout? |
frontal |
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Pertains to the tail? |
caudal |
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Toward the tail? |
posterior |
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Toward the backbone? |
dorsal |
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Toward the belly? |
ventral |
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Toward the side? |
lateral |
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Toward the midline? |
median |
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Near the reference point? |
proximal |
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Far from the reference area? |
distal |
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head area? |
cranial |
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neck area? |
cervical |
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upper trunk? |
thoracic |
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middle trunk? |
lumbar |
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lower trunk? |
sacral |
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tail area? |
caudal |
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symbol for male? |
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symbol for female? |
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How do you determine the sex of your fetal pig? |
Swelling near posterior- MALE, fleshy papilla- FEMALE |
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Is the pig digitigrade, unguligrade, or plantigrade? |
Digitigrade because they walk on the tip of their toes. |
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Are pigs herbivores, carnivores, or omnivores? |
Omnivores, pigs will eat anything from meat to vegetables, etc. |
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Another name for nostrils? |
nares |
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Long, external fold of the ear? |
pinnae |
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Why is the fetal pig a good specimen to dissect? |
Internally, pigs are almost exactly the same as humans (omnivores=similar digestive system, and organs are located in the same place). |
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Tissue that makes up skin? |
epithelial, tail |
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Label the drawing. |
See page. |
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Define mammals. |
Vertebrates having hair on their body and mammary glands to nourish their young. |
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The majority of mammals are placental meaning… |
the developing young, or FETUS, grows inside the female’s uterus while attached to a membrane called the PLACENTA. |
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Placenta |
source of food and oxygen for the fetus, serves to get rid of fetal wastes |
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The dissection of the fetal pig in the lab is important because… |
pigs and humans have the same level of metabolism and have similar organs and systems |
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The largest umbilical vein does what? |
1) carries blood from the placenta to the fetus. 2) carry blood from the fetus to the placenta. |
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Mammary papillary |
tiny bumps on the ventral surface of the pig’s anus, present in both sexes, in the female these connect to the mammary glands |
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masseter muscle |
works the jaw |
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palate |
top of mouth |
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lymph nodes, salivary glands |
… |
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epiglottis |
cone-shaped structure at the back of the mouth |
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nasopharynx |
above the epiglottis, round, carries air from the nostrils to the trachea |
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trachea |
large tube in the thoracic which supplies air to the lungs |
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canine teeth, incisor |
tearing food, shorter and used for biting |
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