PRESENTATION OUTLINE
The frog body has adapted in many ways to make it possible for them to live on land. Some have brightly colored skin to discourage predators from eating them. Their skin also emits a toxic slime.
Frogs have lungs as well as gills so they can breath under water and on land.
Sight
Frogs have large eyes that protrude from their head giving the almost 360 degree vision, which is need because they do not have necks.
Hearing
Frogs have an external eardrum located behind the eye, this conducts sound directly to the hearing structures. Frogs only use their hearing for communication with other frog. They don't use then to hunt or detect predators
Chemoreception
Frogs use it to act as signals to regulate cell functions.
Breathing
Amphibians are of very few animals that can breathe both under water and on dry land. They have both lungs and gills
Circulatory
Frogs have. 3 chambered hearts they are called the atrium, ventricle, and the mitigate. Amphibians are unique because they have a third circuit that brings deoxygenated blood to the skin in order for gas exchange to occur; this is called pulmocutaneous circulation
Excretory
Amphibians must be able to rid themselves of excess water when in their hypotonic homes. They preserve water while and land. To deal with excess water frogs a large glomerulus and relatively small tubules
Habitats
Frog live in or near ponds
They live hear to keep their skin moist and to lay eggs so that when the eggs hatch the tiny tadpoles can cling to the pond weeds
Digestive organs
Mouth
Pharynx- a passage leading from the mouth to the esophagus
Esophagus- the swallowing tube in which food passes through from the mouth to the stomach.
Stomach-secretes enzymes and acid to digest foods
Small intestine- absorbs nutrients and minerals from food, responsible for 90% of digestion
Large intestine- extracts water and salt from waste before it is eliminated from the dy
Cloaca- common chamber and outlet into which intentional, urinary, and genital tracks open.
