Presentation on theme: "Frog Dissection. Comparing 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."— Presentation transcript:
Comparing 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. Smooth Skin Lays Eggs Metamorphosis Develops inside mother Bear Live Young Hair MAMMALS Amphibians
Let’s take a look at our specimen Notice the coloration of the frog. What is the advantage?
External Anatomy - What will we see on the outside of the frog? Eye with Membrane Ear (tympanum) Webbed Hind Feet
External 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.
External Anatomy – Examining the Mouth Area Teeth Eustachian Tube Esophagus Glottis Tongue
External Anatomy – Comparing Frog & Human Frog PartFunction Eye with membrane Sight EarHearing Webbed FeetSwimming TeethChew food Eustachian TubeTube leading from throat to ear; helps equalize pressure EsophagusFood tube which leads to stomach GlottisAir tube; passage to lungs TongueSticky to catch food; attached in front SkinSmooth,moist, protects, allows O 2 to pass THINK! – What are the similarities and differences between frog and human?
Internal Anatomy – Making the Cuts Carefully use the scissors to cut through the skin.
Internal Anatomy – Structure & Function Heart Liver Fat Bodies Small Intestine Stomach Spleen Large Intestine
Internal Anatomy – Structure & Function Gallbladder Lungs
Internal Anatomy – Structure & Function Testis Kidney
Internal Anatomy – Comparing Frog & Human Frog PartFunction Heart3-chambers; pumps blood Liver3 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 fat StomachStorage site for food where digestion begins Small IntestineWhere food continues to be digested and nutrients absorbed in bloodstream Large IntestineWhere most of water is reabsorbed and solid waste begins to be created SpleenStores blood cells KidneyCleans the blood of wastes LungsTakes Oxygen in and gives out Carbon Dioxide TestisMale reproductive organ; makes sperm
Homework A 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!