Pig Dissection Flashcards
ears
- help gather and concentrate sound waves
pinna
external flap of ear which gathers and concentrates sound waves
external acoustic meatus
short passage that transfers sound to the eardrum
eyes
protected by: eyelids, nictitating membrane used by organism for vision
upper and lower eyelids
protect the eyeball
nictitating membrane
- protects eyes
- covers anterior portion of eyeball
- in some animals, can move across the eyeball to keep the eye clean
- in humans, is a vestigial structure in the median corner of the eye
mouth
fleshy lips and muscular cheeks used for eating and digesting food, part of oral cavity
fleshy lips
Holds food in place and lets it enter the mouth
cheeks
enable young to suckle/feed
nostrils (nares)
on the end of the snout enable entry and exit of gasses
umbilical cord
tube where blood vessels carried nutrients, oxygen and waste materials from embryo to the placenta and vice versa
nipples
deliver breast milk to young
tensor fascia lata
large muscle at the anterior surface of thigh, assist in movement of the hip
gluteus medius
a thick muscle which lies just posterior to the preceding muscle
- action is to abduct the thigh
gluteus maximus
- posterior to the gluteus medius
- function: to abduct the thigh
biceps femoris
- a very large, triangular muscle comprising most of the posterior half of the lateral surface of thigh
- action: abduct the thigh and flex the shank
Gastrocnemius
large calf muscle, to extend the foot
tibialis anterior
- most ventral of the shank muscles
- action: to flex the foot
extensor digitorum longus
- action: to extend the digits
tongue
on ventral surface of oral cavity, starts process of swallowing and has taste buds for tasting
hard palate
- forms dorsal surface of oral cavity
- separates oral cavity from nasal cavities
soft palate
- posterior to the hard palate
- contains no bone
- aid speech swallowing and talking
pharynx
serves as the entry point for the respiratory and digestive system
epiglottis
- flap at the base of the tongue
- partially covers glottis
- helps prevent food from entering the trachea by covering glottis during swallowing