2Comparing frogs with humans Frogs have a lot of the same organs that humans do. By dissecting a frog it will allow us to learn about the structure and function of some of our organs.AmphibiansMAMMALSSmooth SkinHairLays EggsBear Live YoungMetamorphosisDevelops inside mother
3Let’s take a look at our specimen Notice the coloration of the frog. What is the advantage?
4External Anatomy - What will we see on the outside of the frog? Eye with MembraneEar (tympanum)Webbed Hind Feet
5External Anatomy – Examining the Mouth Area To examine the mouth area you will need to use your scissors to cut the sides of the mouth slightly.
6External Anatomy – Examining the Mouth Area TeethEustachian TubeEsophagusGlottisTongue
7External Anatomy – Comparing Frog & Human Frog PartFunctionEye with membraneSightEarHearingWebbed FeetSwimmingTeethChew foodEustachian TubeTube leading from throat to ear; helps equalize pressureEsophagusFood tube which leads to stomachGlottisAir tube; passage to lungsTongueSticky to catch food; attached in frontSkinSmooth,moist, protects, allows O2 to passTHINK! – What are the similarities and differences between frog and human?
8Internal Anatomy – Making the Cuts Carefully use the scissors to cut through the skin.
9Internal Anatomy – Structure & Function HeartSpleenLiverStomachFat BodiesLarge IntestineSmall Intestine
10Internal Anatomy – Structure & Function GallbladderLungs
11Internal Anatomy – Structure & Function TestisKidney
12Internal Anatomy – Comparing Frog & Human Frog PartFunctionHeart3-chambers; pumps bloodLiver3 lobes; produces bile and sends to gallbladder during digestion (breaks down fat)GallbladderSmall sac which stores bile and sends (secretes) to small intestine where it contacts food and breaks down fatStomachStorage site for food where digestion beginsSmall IntestineWhere food continues to be digested andnutrients absorbed in bloodstreamLarge IntestineWhere most of water is reabsorbed andsolid waste begins to be createdSpleenStores blood cellsKidneyCleans the blood of wastesLungsTakes Oxygen in and gives out Carbon DioxideTestisMale reproductive organ; makes sperm
13HomeworkA short ticket slip will be given before each lab session to make sure you have the knowledge to participate!You must earn a “B” or better on the ticket slip in order to participate!Tonight – Study structure and function of external anatomy!