Lab 4 - Rat dissection Flashcards
Nares
Nostrils
Vibrissae
Whiskers
Anus
Opening to digestive tract
Pinna
Flap like external ear
Nictitating Membrane
Inside the corner of the eye - protection
Urethral orifice
Most anterior opening for urinary system
Incisor
Narrow edged tooth adapted for cutting
What is the tracheae
A tube that air goes down to allow access for air to go to lungs
From neck to chest
White and lined with cartilage
What is opening of tracheae called
Glottis
How can you distinguish between tracheae and oesophagus
Oesophagus has lack of cartilage rings
What occupies most of the abdominal space
Liver
Function of liver
Store glycogen
Transforms wastes into less harmful susbtances
Produce bile - digestion of fats
What thing does human have and rat does not and what does it do
Gall bladder
Stores and concentrates bile before being released into GI tract
What is the heart surrounded by
Pericardium - tough protective membrane
How many lobes does right lung have
3
How many lobes does left lung have
2
What is the diaphgram and its function
Thin muscular sheet that seperates abdominal and thoracic activities.
For respiration
How many lobes in rat liver
4
How many lobes in human liver
2
What is the spleen and its function
Dark coloured organ left of stomach
Storage organ for platelet’s and a site for filtering
What organ system is spleen part of
Circulatory system
Which organ is near the stomach and appears yellowish
Pancreas
What does pancreas do
Produce sodium bicarbonate and enzymes - digestion
Which two organ systems is pancreas part of
Digestive system and Endocrine system
What is the 1st section of the small intestines
Duodenum
What is a mesentery?
Translucent membranes attaching to and holding the internal organs in place. Fat bodies often appear within the mesenteries and blood vessels travel along them to various organs.
What is the last section of the small intestine
Ileum
What is another name for large intestine
Colon
What is the terminal portion of the colon
Rectum
What is the alimentary canal
The tube that runs from your mouth to your gut – opens insides up to external environment – made from inner layer epithelial cells
What is the whitish tube that leaves each hilum
Ureter
What does ureter do
Carries urine to urinary bladder
What is the last place urine will pass through
Urethra
What is the main constituent of urine
Water
What are the main toxins excreted in urine
Urea
In the integumentary system, which cell type also functions as part of the immune system
Dendritic cell
What is the outermost epidermal layer
Stratum Cornea
Which of the following is NOT epidermal derivative
Sensory receptor
What forms when sweat and sebum mix
Acid mantle
What does acid mantle do
Retards bacterial growth because low pH - acidic for bacterial growth
How do defensins work, and where are they produced?
In the epithelial cells, secreted protein – out into sebum- work way into membrane of bacteria – disrupt it – create pores – bacteria die
What does the integumentary system make that is essential for skeletal system
Vitamin E
