AMPHIBIANS

BODY STRUCTURE

• Have a bony skeleton
• Large shoulder and hip bones to support weight
• Has an interlocking vertebrate to keep backbone from sagging
• Has 4-5 digits on forelimbs

SKIN

• They have thin, wet skin with many glands
• They can also use their skin to breathe
• Has (2) layers of skin:
• 1) Epidermis; which may have keratin
• 2) Dermis; ,this is were glands are located (some are poisonous)

SENSES

• Have a well developed middle ear, with tympanic membrane and states, to hear out of water
• Has the ability to detect odors in the air using olfactory epithelium that lines the nasal cavity
• Detect chemicals throught the skin
• Sight is also modified for life on land; eyes have acornea as a primary light reflecting surface
• Which also have eyelids and lacrimal glands

SENSES CONT.

• Frogs have a great sense of smell that can be used to smell chemicals
• Frogs or amphibians use a sense called ofaction to smell
• They may also sense chemicals smells through the air

BREATHING

• While on lands frogs can breathe as we do with lungs
• Frogs or amphibians also can breathe through their skin:
• They breathe through the skin with a process of gas exchange
• (Mostly breathe through skin while under water or buried in soil

CIRCULATORY CIRCUITS

• Frogs have a three chambered heart
• (1) ventricle- pumping chamber (2) atria- receiving chambers
• Deox blood enters the right atrium, while ox blood enters the left
• Lungs and skin get oxygen that is pumped through ventricle through the body

EXCRETORY

EXCRETORY CONT.

• Frog's start by liquid waste that passes through the kidney to ureters then to urinary bladder
• The frog excretory system consists of: kidneys, ureters, bladder and cloaca
• They can also transport wastes through their skin like water.
• Solid wastes however are moved out through the cloaaca from large intestine

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HABITAT

DESCRIPTION & REASONS

• Can not be in polluted environment, this could kill them
• Because skin absorbs water they need clean waters
• Need moist wet lands that aren't polluted, so skin wont dry out and they can breathe
• Also need a moist place or water to lay eggs
• And also mud to help regulate body temperature if it becomes to warm

DIGESTIVE ORGANS AND FUNCTIONS

• Large Intestine- stores undigested foods
• Liver- processes digested food
• Stomach- stores and mixes food with enzymes for digestion
• Pancreas- enzymes to break food down
• Kidney- to transport liquid waste and cloaca- move soild waste

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