Presentation on theme: "Frog Lab Preview. Frog External Features : Frog skin Smooth and moist Takes in oxygen Absorbs water through the skin and can also lose water through."— Presentation transcript:
Frog Lab Preview
Frog External Features : Frog skin Smooth and moist Takes in oxygen Absorbs water through the skin and can also lose water through skin. Eyes Sight – 3 lids, 2 are upper and lower (color of skin), 1 is transparent. Retract in head to help push food down Nostril – Smell only, can not use for breathing. Tympannum – (eardrum) for hearing Mouth – large, has vomerine teeth. Front legs Digits not webbed Used for grasping Hind legs Powerful muscles for jumping Digits webbed for swimming
Frog Body Systems Circulatory System – How the blood circulates through the body. Heart - RED – pumps blood. Blood Vessels Artery – RED – carries blood from the heart to the body. Oxygen rich blood. Vein – BLUE – carries blood from the body to the heart. Oxygen poor blood. Spleen – BROWN – has a few jobs associated with specific blood cells.
Frog Body Systems Respiratory System – How the frog breathes. Lungs – PINK / PURPLE – Used to take in oxygen while on land. Skin – Used to take in oxygen while in water. Nervous System – How the frog senses and feels things. Brain – Enclosed in the skull. Spinal Cord – Enclosed in the spine.
Frog Body Systems Reproductive System – Making more frogs. Male – Testis – make sperm Sperm Duct Cloaca Female – Ovary – make eggs Oviduct Cloaca ** Eggs may be visible in a female frog during dissections. Testis
Frog Body Systems Reproductive System – Making more frogs. Female – Ovary – make eggs Oviduct Cloaca ** Eggs may be visible in a female frog during dissections. Eggs Oviduct
Frog Body Systems Digestive System – Taking in food and breaking it down. Mouth – takes in food; anterior end. Pharynx - BEIGE – muscular tube leading to the esophagus. Esophagus – BEIGE – tube going from the pharynx to the stomach. Stomach – BEIGE – stores food. Small Intestine – BEIGE – main organ in digestion. Large Intestine – BEIGE – Absorbs water and stores wastes. Cloaca – releases wastes.
Frog Body Systems Digestive System – Other structures to help break down food. Liver – BLUE – 3 large lobes that produce a substance called bile. Bile helps to digest fats. Gallbladder – LIGHT GREEN – stores bile. On the underside of the liver. Pancreas – YELLOW – produces enzymes for digestion. This is hard to find.
Frog Body Systems Urinary System – Filters excess water and toxins out of body. Kidneys – BROWN / BLUE – Remove wastes from the blood. This also excretes urine. Bladder – BEIGE – Stores urine. Cloaca – Urine exits the body. Excretory System – Gets rid of wastes. Cloaca – means sewer. This is where the waste, urine, sperm and eggs exit the body. Other Structures Fat Bodies – YELLOW / GREEN – Helps insulate frog.