Transcript dissection of frog

EXTERNAL STRUCTURES OF THE FROG - DAY 1
1. Eye – to see
2. Tympanic Membrane (Tympanum) – to hear
3. Hind Leg - jump
4. External Nare - breath
7. Nares - breath
8. Maxillary teeth – hold prey
9. Vomerine teeth – chew prey
5. Mouth - eat
6. Front Leg – movement
10. Tongue – capture prey
11. Eustachian tube – equalize pressure
Vomerine – chew the prey. Maxillary teeth hold the prey
Capture prey with their tongue. USE THEIR EYES to push food in their gullet.
REVIEW:
How does the frog eat?
• Look inside his mouth.
• What are the two pads on the roof of his
mouth?
• He uses his EYES to push the food down into
his gullet. (his tongue is connected in the
front of his mouth – so he can’t use it to push
down food like we do)
Internal Anatomy – DAY 2
4. LIVER
Draw in the gall bladder
9. HEART
3. LUNGS
Use the CIRCULATORY SYSTEM graphic flow
chart to illustrate the flow of blood through
the frog
CIRCULATORY SYSTEM
OUT TO BODY
LUNGS
FROM BODY
From body  Right Atrium  Ventricle  LUNGS
 Left Atrium  Ventricle  out to body
DETERMINE GENDER – DAY 2
• IF YOU FIND BLACK AND WHITE SMALL BALLS
INSIDE THE FROG – THESE ARE EGGS.
– Congratulations you have a GIRL!!!!

IF YOU HAVE 2 SMALL KIDNEY BEAN
SHAPED ORGANS LOCATED NEAR THE
SPINE – congratulations you have a
BOY!!!
LIFE CYCLE
• USE WHAT YOU KNOW TO FILL IN THE LIFE
CYCLE DIAGRAM ON THE BACK OF YOUR
DISSECTION PACKET.
INTERNAL ANATOMY – DAY 3
DIGESTIVE SYSTEM
1 – GULLET
2 – ESOPHAGUS
Find the pancreas – located near the back of the
stomach, it looks like a think ribbon
10 – STOMACH
Open up the stomach by cutting at the top and
bottom of it. Put your scissors inside the cut
and it open to reveal what is inside
INTERNAL ANATOMY – DAY 3
DIGESTIVE SYSTEM
12 – SMALL INTESTINE
Find the connection where the small intestine and the
large intestine connect
13 – LARGE INTESTINE – do not cut this…it contains
poop
11 – MESENTERY – connective tissue that keeps all
internal organs together
14 – SPLEEN – draw in the spleen in the mesentery by
the small intestine – removes old blood cells
FILL IN THE DIAGRAM
• Use the information you have gathered to fill in the diagrams
for the digestive system on your note packet.
EXCRETORY SYSTEM
• FIND THE KIDNEYS (maroon/red structures
near the frog’s spine)
• 5 – KIDNEY
• 7 – URETER
• 8 – BLADDER
• 6 – CLOACA
• USE WHAT YOU KNOW TO FILL IN THE
EXCRETORY SYSTEM DIAGRAM ON THE BACK
OF YOUR PACKET
EXCRETORY SYSTEM