Lab 1 - Rat Flashcards
What is the mesentery?
two layers of pertioneum suspending the intestine
Name the organ found in the thoracic cavity
Lungs
Name the organ found in the abdominal cavity
The intestine
Name the organ found in the pericardial cavity:
the heart
What structure separates the abdominal and thoracic cavity?
Diaphragm
What is the mesenterys function?
Holds intestines in place and stops friction
Parietal peritoneum lines
the abdominal wall
Visceral peritoneum lines
the intestines
Do rats have canines?
no
Describe rats inscisors:
grow throughout life, and lack enamel on the posterior surface so that rapid wear can create a chiseled effect
Why is there spacing between the incisors?
So that width of bite can be varied at will
Do rats have gall bladders?
no
Shape of rats uterus
Y shaped ( two horns) so that multiple embryo’s can be implanted
A male rats penis is mostly out/in the abdominal wall?
inside
Similar to humans, the rats hands and feet are:
pentadactyle (5 digits)
The rates nostrils … underwater
can close
What is the purpose of vibrissae (whiskers)?
to help rats navigate confined dark spaces
Female rats have how many holes?
3 (urethra, vagina and anus)
Males have 2 holes?
Urethra (covered by prepuce) and anus. They also have a scrotum which contain the testes.
What are the pleural cavities?
two lung cavities
What membrane lines the lungs?
Visceral and parietal Pleura
Thymus gland is a … gland and its role is to what?
lymphoid gland, produce t lymphotcyes and secret hormones for the development of other lymphoid tissues
Does the oesophagus lie dorsal or ventral to the trachea?
Dorsal
